ok, here it goes. i am a young guy (not quite 19 yet), and about 3 months ago ended a relationship of 18 months. i now want to take her back...desperately so. she found a boyfreind about a month after we split. she has decided to take me back, she is gonna leave him, but there is a big problem. she had sex with her new boyfreind. she was a virgin with me, but i guess her perspective has changed. now, i am a very sexually confident individual. i find pleasuring a woman to be an artform, and he was in no way as satisfying (or attractive) as me. sounds great right? whats my problem right? size. penis size that is. i am big, not huge, but definitely bigger that average. i am not insecure about this. and i am also not insecure as to the fact that her new guy was bigger than me (at least thicker). what the problem is is that i am petrified that she will feel different. the thought of him changing her sickens me. i guess it was a bit difficult to get in. they used condoms, whereas with me we never did (i hate those things). i am absolutely terrified, that after a week or so, and my wounds have begun to heal, we will go to have sex...and i will feel him. his mark on her, or that i may feel very different to her. He was not a giant or anything, but big enough for them to have a bit of trouble at first. it was like that with me too when she was a virgin. i love this girl, i just no longer appreciated her after a year and a half, and new that a bit without her would probably bring how lucky i was, and how great she is back into perspective. it worked. so my questions are: am i over reacting? if so why? how exactly do vaginas behave in response(ladies please)? they can stretch alot...but will it alter her? they had sex 4 times. should i be worried about a difference in our sex, or will it more or less be exactly the same? please help. i want to know what i may expect before we do it(i would not be surprised if i broke down crying if she felt really different, which would of course be horrible for our healing relationship)...any one with knowledge or experience with this would be greatly appreciated.