Arruhh dont know what to do

Okay any posts will be a huge help..ive been with my partner for little over a year now and everything was fine..but lately hea been very distant..and ive asked why and hes said nothings wrong...but clearly something is i rang him yeasturday and he was in the shower and told me to ring back next week i took it as a joke and left it an hour so he could fnish him shower befor ringin him back .,.but it turns out he wasnt making a joke..i asked why he was being like it and he said i dont know ..and i asked if it was anything i had done to upset him or anger him but he said not as far as i know..i told him id give him space if thats what he wanted.. but he didnt answer... so i said ill ring him back in 2 days,, well for the past 2 months ive been getting closer and closer to my mates ex boyfriend.. and we have the same interests.. down to nearlly every detail and i rang him today after i was on the phone to my boyfriend and cause i was upset and had clearly been crying he sat and listened to me ..he said if i was his he'd make me feel special every minute hes with me and my boyfriends lost sight of what hes got..ive grown very fond of him and he says he loves me and wants to be with me..i dont know what to do i dont have the strenth to leave my boyfriend but im gettin closer to this other guy ..and theres very strong feedlings there...what do you recomend? i think im falling for him ..

I dont want to be with this other guy..i want to make things with my boyfriend work but no matter how hard i try it just crumbles.. and what the other gu is promising me..is everything i want my boyfriend to do.. but hes ot sensitive like the other guy..my heads telling me not to be with my boyfriend because hes shutting me out and dont tell me how he feels ..but my heart just cant leave him

Feel free to object to everything I'm about to write here.

You may be someone who needs to feel like they're with someone because loneliness is a feeling you abhor. I would understand because I'm like that. But when that is put alongside a fear of change, even being with someone you don't like is more satisfying than risking being alone.
Give your boyfriend the "last chance" and make it stick. If you've said this and he doesn't respond, you don't take it back because then he knows he can take advantage of you. If it's his choice not to respond to you, you shouldn't be in a position when it is his responsibility to do.

That being said, I wouldn't plunge straight into a relationship with the other guy directly afterwards, and I don't condone becoming partners during your current relationship. If you appear like you have to be with this other guy, he'll get the impression that he can do whatever he wants because you can be taken advantage of. Get yourself free from this unrequited partnership and spend some time in singledom for a little while to show the other guy he's not going to get everything he wants just by snapping his fingers.

Hope this helps.
HxR