Hey guys, I'm not sure wtf is going on but I feel the need to post this and get some help from guys with experience. So, there is this girl I really like. I've managed to get her number and some dates with some daygame

and now it seems she will be my GF.
She's been to my place several times now and everything seems great, even when we start making out. I went down on her and made her cum (several times) but then I can't seem to get hard enough to fuck her. I'm not even nervous or something but I can't say I am extremely horney either.
It first happened after a few bottls of wine and some whisky.. So I figured it must have been the alcohol, but now it happened when I was sober. And yes, I think she is VERY attractive. Any suggestions? I think I'm to young for v1agra xD (20)
Any advise may help, thanks[/list]