all of my 4 GF's ive had (past 9yrs)came from having regular sex with a girl. Slowly they turned into more. Find a girl you like to fuck and just keep calling/seeing her, dont try to take her out to dinner, or impress her with anything....just be yourself. Since your in college go out drinking with a chick, take her to a football game, whatever just keep up with contact. calling/texting/email. Il bet your fuck buddy turns into a GF.