Last night and this morning Me and my partner tried having sexual intercourse, but we just couldn't, I am 17 and she is 16 and we are both virgins so we are new to the whole experience, what happened was that I couldn't get it in, either I am too big for her or she is too small for me, we have quite a big height difference, I am 6ft tall and she is 5ft 2inches small, my penis is around 7 inches in length but I don't know the circumference, we have done all the other things, oral sex, masturbation etc, when I am masturbating her i can just about fit 2 fingers in so I never thought this problem would spring up, but she opens her legs, I would slowly try to slide it in but it can't get in, then this morning I tried lube and it still wouldn't get in, I need this problem to be fixed because she lives 4 hours drive away and I see her rarely, so we try to make the complete MOST out of the time we spend together, we were both looking forward to making love but this happened and it is a major set back.
Maybe someone can give some tips on how to fix this, or maybe just put me out of my misery and tell me we can't.
Thanks in advance for reading and the sooner I hear some suggestions the better