About 6 months ago, I had a drunken one night stand with a girl. We knew eachother through mutual friends, but had never really spoken, and didn't speak or see eachother after that until this past october, when we drunkenly made out one night at a friend's house and talked for a bit. Then, the next weekend, she came home with me after hanging out at a bar with friends and we had sex again. Go to early november, we had been texting back and forth a lot, and I decide I really like her. I ask her out on a date and take her to dinner. I had a great time (she seemed to have a great time), and I walk her home after dinner. The next night, we are at a mutual friends party. Long story short, we talk a lot, dance, get moderately drunk, and she comes home with me again. We are in my bed making out, and after about a minute she says "no sex". I pause for a second and say "ok that's fine", or something along those lines, and made sure she wasn't pressured at all. I wanted sex very badly, but I really like this girl and felt that it would pay off for a relationship if I didn't pursue an explanation for her saying no. Since then, we started texting back and forth even more and went on another dinner date which went very well (again, from my perspective as I obviously don't know what she is thinking). We end up meeting up with friends at a bar, and I ask if she wants to come home with me. She was pretty drunk, and opts to go home with her friends instead. What confuses me is why she stopped wanting sex once I took her out on a date. It seems counterintuitive to me, and the following are the only explanations I can think of: She doesn't enjoy the sex with me? She wants to have sober sex? She doesn't want to make herself seem easy now that I am "courting" her in the traditional sense? I'm 21 and graduated college last spring, so pretty inexperienced with relationships. Any input appreciated.