ok--someone's going to have to explain this to me: what is smsing???
anyways, you should be able to have guy friends. period. does he have girl friends? see, there's a difference between being protective and possessive.
protective might mean that he won't let you go out alone ever if you live in a dangerous area. your boyfriend is being possessive, and that's not cool.
if i were you, i would sit him down and have a nice little chat: tell him that you're his girlfriend, not his property, and that you should be able to have guy friends without him freaking out.
if he listens, that's great. but if he can't understand that, then run in the other direction--over-possessiveness is one of the most common forms of emotional abuse.
a good relationship shouldn't make you feel bad--you should be free to be who you are and be accepted anyway. lay it on the line for him--if he can't accept it, then maybe it's time to move on.
good luck!