Try Googling your own cell phone number. See what comes up. He knows the town where you live? and he knows your name? He wouldn't have to be an ace detective to find you. By now, you should be catching on to what a position you've put yourself in. If you can't manage to stop all contact with this guy, at least make up your mind to make yourself as boring as possible. It seems he hasn't got much tolerance for boredom.

If worse comes to worse, you can make a police report saying that this guy is cyberstalking you. Meanwhile, stop giving out specific info about yourself. Or give out false info. What law says you got to be truthful with a some stranger you know little about. He has even told you things about himself that are unsavory. That's pretty scary right there. Who knows what he hasn't told you? You better start backing out of this any way you can. You're a college student. Find things to get involved with on campus.