My problem is I can't come quickly and because of that my soon to be wife can't have lots of sex with me since it is taking too long and she gets sore after she comes. At first it was nice to know I can have sex for even few hours but now it's terrible.

I'm 23 years old, had only one sex partner since I started sexual life, and that is 7 years now. Me and my girlfriend tried many things, watching erotic movies together, playing with each other before penetration etc. Sometimes it helps, sometimes it doesn't. There are days our sex last for 30 minutes and thats cool, we are both happy with that, but after 2+ hours of having sex she is exhausted and can't have it anymore, while i'm not even close to having orgasm.

If anyone have any ideas, I'd love to hear them.