Is There Something Wrong With Me?

I've been next to my girlfriend for the best part of two years, we've be having sex since nearly three months of going out. I am 18 and she is 17 and ever since I have found impossible to tell apart thing, she will accomplish orgasm repeatedly within nearly 15 - 20 minutes whereas it will take me significantly longer, anything up to two hours to orgasm. The worst point is that after she has climaxed more or less three or four times she will just concerned of forget about me and shift off to sleep.
Is nearby something wrong with me or her or is she of late being duplicate kind of inconsiderate that I hear women going on roughly speaking (i.e. A women's right to an orgasm)? no but you should think outside the box
oh dear ! procure over yourself. it would be interesting to hear her side of the story.