Hes not a friend really. I met him on facebook (goes to the same college), started chatting, then he sort asked it straight out. He's cool, and just wants to help me experiment.
It sounds like you're just curious about experimenting, and that's totally okay.
He sounds like just an acquaintance. And the fact that you go to the same college and you met on facebook, I think you may want to find out more about the guy. Who are his friends and the people he hangs around? I mean, if he casually offered you a blow job, then how many others guys did he ask, too? --on and off campus!! This guy might be the campus "bj kid", or he might be a blabber mouth that talks too much. What do other people say/know about the guy.
Don't get me wrong. Casual sex is cool and can be really hot. It's just that if you're only just experimenting right now, then you may not want to experiment with someone who you're going to see around campus a lot-- at least not until you're comfortable with that.
My first sex with a guy was my roommate in junior year, but we were really good friends and everything was cool about it. After that, anyone else I messed around with was someone off campus. No strings. No problems. I also had a gf the entire time (so did my roommate).