I have a stalker or an obsessive guy,,on my hands.. help me please?

Sounds like you are sending mixed signals here. What do you mean "I hinted to him that I just want to be friends....." How about giving honesty a shot? He obviously thinks you have a romantic interest in him and is pursuing you based on that. He isn't obsessive. It's time for you to get a dose of maturity and either start acting like a grown up or quit with the dating scene until you are able to act like a grown up.