maybe he's gay, or maybe he's a jerk bisexual. either way, telling you would have been nice so you wouldn't think "is it me?"

i know a guy who does that to all his partners. he's mildly into guys, and he flirts with them, but mostly he only likes sex with anyone while they're new to him. once a relationship is established, he loses all interest in girls or guys or the VERY sexy tg he was fucking.

the thing about this guy - i've known plenty of others like him, but he's the one that was the most obvious about it - is he lets his partners think that THEY are no longer appealing rather than admit he either can't or doesn't want to sustain a sexual relationship. and if he's with a guy, he lets them think the problem is he'd rather be with a woman - if he's with a woman, he flirts a lot with guys in front of her.

maybe ya found yourself one of those. no matter what HIS issue is, though, you don't need it unless you're into emotional punishment. everyone is sexy to someone, so why be with someone who acts this way toward you?