Oh college....it's all about who you know and what you know. Hopefully you focus on your education...and some late night study sessions

with one of your female classmates. I recommend getting involved on campus and branching out into many socia circles. Personally, I wouldn't go hitting on every girl on campus because you can easily be labeled that guy...
It sounds like you're still a new comer to the world of dating. I recommend staying in date mode in college for a little while. Have fun man, literally have a dating pool easily accessible to you. That's where I blossomed and had many experiences that I am glad I took advantage of.
As far as hooking up and having sex, well just follow that guide the other poster talked to you about and you'll have your first lay in no time. Don't worry about what the chicks at college want, just have your sex and be cool about it and you'll figure it out on your own.