what would you do? please help me!!!

i know this may look quite long but please read it cause i really need some help and advice on what to do!!!!!!!

my mum and dad are still together............and i thought they loved each other.....................................
but the other day i asked my dad if i could use his mobile to phone one of my mates, he said yes, and when i turned it on he got a text message (i was in a different room to him) so i decided to read it............ i found out that he had 3 messages......
the first on said "hi if you want to see me txt me please", the second one said "empty message no words is that a no then", and then third one said "ok if you don't want to see me again just say and i will not bother you again"! i looked at his recieved calls and dialed calls and he had been phoning the number alot and the number had been phoning him alot!!!!! he alwayz take money out of the bank and spends it really quickly and he alwayz comes in late, like he goes out at 12:30 in the afternoon and doesn't get back til about 7:00 in the evening (he doesn't have a job at the moment so he has all day to do what he likes)!!!
my mum alwayz used to say that she thought he was cheating on her but i alwayz stuck up for him and said he wouldn't do that!!!! but now i've found this out im really mad and upset cause i can't believe my dads cheating on my mum!!!! i'm going to phone the number when i get the chance but i know it's going to be a women!!!! i want to tell my mum but i don't want to be wrong and end up telling her something that isn't true!!!i don't want my mum and dad to split up but i guess they have to now!!!
i know i should phone the number and see who it is, and i know when i do i have tot ell my mum!!!!! but i'm still really confused and i don't know how to handle this, if you go and read my poem "the lie" you would sort of understand what has happened to me before now!!! and if my mum and dad split up i would have to go into care cause of what my mum has done before and now what my dad has done!!!!! i hate this!!!!!!!!! someone help me please!!!!!
luv RaNdOmGaL xxx

to tell****

fine then no1 help me!!!!!
luv RaNdOmGaL xxx

but i know what my dad is like if i confronted him he would probably either kill me or threaten me not to tell my mum or anyone!!!!! and if he killed me my mum wouldn't know why!!!!
luv RaNdOmGaL xxx

i thought about doing that but i don't really know if i would even want to go with my mum because i don't really love any of my parents (read my poem "the lie" you would sort of understand a bit better) i just feel sick everytime i'm with my dad and everytime i hear his voice and everytime i hear him giving excuses to my mum for why he was late in!!!!! i just can't handle it!!! i hate being in the situation!!!!
luv RaNdOmGaL xxx

thanx i'm still quite confused but i feel a bit better now i've spoken to someone!!!
luv RaNdOmGaL xxx

ok thanx!!
luv RaNdOmGaL xxx

hey people i'm back, i haven't phoned the number, because i'm to scared and i don't know what to say if a women answers :( help me!!
luv RaNdOmGaL xxx

hey hun slow down. you need to breath. hun things happen and maybe your mom and dad cant work things out. One of my friends parents are in the same situation. things will turn out for the best maybe not right now but if you let your life run its course life will get better along the way I wish you luck.

i want to just hang up but then i won't know if he is actually cheating or if theres another reason (even though it doesn't seem that way) he phones and texts the number at like 11 at night!!! she phones him only when he isn't in the house!!! and he texts her saying things like "call me when you get this message" :(
i don't want my parents to split up :( i couldn't handle it!!!!
ok you all probably think i'm overeacting but i can't help it!!!!
luv RaNdOmGaL xxx

i phoned the number, and it was a women she said hello twice and then i just put the phone down....... i want to phone her and say something but i don't know what to say!! and now i don't know what to do cause i know it's a women!!!!!!!!!!
luv RaNdOmGaL xxx

oh yeah shes just gonna tell a random stranger who she is and what her name is!!!! my dad doesn't even know that i know he's cheating!!!!
luv RaNdOmGaL xxx

you don't know what my dad is like, he would probably threaten me or even kill so that i couldn't tell my mum!!!!
luv RaNdOmGaL xxx

help!!!!!
i told my mum that my dad is cheating, and she had ago at him!!!! and he said that he wasn't cheating, and he told us that - him and his mates went on a porn site and for a laugh they gave this women his phone number and then she wouldn't leave him alone but he said he's got rid of her now!!!!!
but my mum doesn't believe him, and i don't know whether i should??!!
and also my mum is so freaked out over whats happened, she now says she's gonna take an overdose to kill herself!!! and i don't know what to do, cause i decided i was gonna choose my mum, and that we was gonna just leave my dad without telling him but my mum has now messed it all up, and now she's too ill to go anywhere - she's not eating, she's hardly sleeping!!!!! i'm so scared!!!

and my mum was told she was in the menapores (sp) (ya know the thing when you get older and you stop having periods) and she hasn't had a period in 4 years and then last night she thinks she had a miscarriage, but she doesn't think she's even had sex in ages!!!!

everythings gone wrong :(
luv RaNdOmGaL xxx

but now my mum is really ill cause i told her, and i could have got it all wrong!!!!
and now my mum is gonna leave when she's better, and i don't know what to do!!! i should have never told my mum, but my dad is a bit......... well......... violant (sp) and i knew that if i mentioned it to him he would possibly kill me, last night when he came in and my mum accused him of cheating he went into the kitchen and brought a knife in and threatened to kill me and my mum :(
i got the phone and said i would phone the police and he nearly stabbed me but then he put the knife away and now my parents arn't speaking - the only time they talk is when they argue!!!!
i hate it and this IS my fault!!!!!
luv RaNdOmGaL xxx

well how would you feel if you knew your mum was really ill and she is threatening to kill herself, and you get phsycically (sp) abused by your dad, and you don't wanna leave the house just in case your mum does something stupid!!!! and you know your mum and dad are gonna split up and your gonna have to pick one!!!!!
HOW THE HELL WOULD YOU FEEL??!!
cause after all that i've been through with my parents i don't know what the hell to do!!!!
so i don't wanna sit here listening to you saying your sick of people thinking it's their fault!!!! my parents tell me it's my fault and so does every1 else so i might as well believe it!!!

sorry i kind of snapped at you when i wrote that last message, it was just i couldn't handle everything, i guess you do know how i feel, yesterday while i was writing that my mum and dad we're arguing in the background, so i kind of took my anger out on you!!!
sorry!
i alwayz thought my parents would stay together forever and i just hate it that i know i have to leave one, my worst nightmare was alwayz that my parents split up and i hated the thought of it but now it is my reality and all i keep hoping is that i'm dreaming and i'll wake up and none of this would have happened!!!!!! i have no brothers or sisters, it's just me having to handle all of this, i just can't take it!!!!
:(
i'm really sorry i shouldn't have taken my anger out on you!!!
luv RaNdOmGaL xxx