I agree with most of the posts here (because some of her behaviour seems a little weird), but I need to add my further two cents:
It's healthy and normal to have friends of the opposite sex. I have male friends I hang out with, without my fiance. He doesn't mention it, and if he told me he didn't like me hanging out with them I'd address his concerns, but I wouldn't allow him to tell me who I could be friends with. That's controlling behaviour.
Live as if you were to die tomorrow. Learn as if you were to live forever. - Mohandas Gandhi