Hey, I just made that up, and it rhymes! High five? Anyone?.
I DON'T feel it's fair to see the circumstances, to know that they're friends, then start demanding they change their lives once you start dating. That's not cool. The only exception to this is if he lied about being friends with women, they started dating, and then he unloads it on her. If she's not comfortable with it, she's not comfortable with it - and again I wouldn't blame her if she said, "You knew my stance on this, see ya later.".
I understand why you're upset, but at the the same time - you need to be realistic and wake up. This guy does not care about you. It's been 6 months and you're "casual." Therefore, he is under no obligation to remember your birthday or anything like that. You give a guy strings-free sex, he's going to take it, and he's NOT going to turn into a boyfriend when there is no reason for him to turn into one. And if he's not a boyfriend, he's not going to act like one..
-My brother told me earlier that my crush was seeing someone and I asked my crush but he denied it and I told him that I knew about this incidence and he just tried to avoid it and said he didn't have a girlfriend:S:S..