I'm an English minor so I did notice a couple grammatical errors, I'll point them out in a second, but all I can say is WOW! This is a very real and honest poem. I can definitely tell you loved this girl, I just hope I never have to go through that pain.
Anyway, so some grammatical changes may make this a more "proper" poem.

Stanza 3- I noticed you said never "of" it should technically be never "have"
Stanza 5- you wrote "saying its" I think what you're shooting for is "sayin is"
and finally
Stanza 6- Change the first Its to It's

you don't have to use these if you don't want...they're just some grammar changes! But the poem doesn't really need to change anything! I loved it!
LKR

0mJ (0h My JeSuS) .. this poem is great .. keep it up

0mJ (0h My JeSuS) .. this poem is great .. keep it up

This poem is beautiful i will look at your other poems later

but thias poem brought tears to my eyes i think it is truely amazing

Aww, no dont change this poem. its perfect the way it is, i have felt like this so many times, but the guy i am with now i know i would die. him and i have been through so much in the past few years that i know we are strong and get through anything. i hope you feel better and get over her. she is obviously dumb and dont know a good thing even if it bites her in the ass.