Is it me?

I love sex. But my boyfriend apparently doesn't... Is this my fault? I am his first but he isn't mine and he says he just doesn't get turned on by me. I personally don't think this is my fault. He has had some gay tendencies and everyone else thinks he is. But I don't. But he has been giving me signs like he's trying to say something. He told me he does watch gay porn. I don't turn him on during sex. He just can't finish while having sex. Does this have to do with me. I mean what should I do. I'm bisexual. And he knows. I just want him to be honest with me. Help!