Build up your male friends first, newchum, before you go trying to chat up women. Find guys who are doing same classes as you, or things that you like doing, and try to spend a bit of time with them. Be seen around the campus with them. When you start talking to a girl, it will help if she's seen you around somewhere, and if you're with someone, she's not only more likely to remember you, she's more likely to continue talking with you. The other purpose of having guy friends, especially if they're more extroverted than you, is to provide another avenue for the conversation to go down, if you hit a brick wall.