Please girls.. why?

02_Si, I feel like he does not trust me and I guess I become annoyed with that. And I know that this pisses him off because when we have talked about this situation before his comment to me is, "Well, how would you like it if I went and hung out with some girl?!". Lets say that he had some interest that more girls like than his guy friends (like a pottery class or something) and he really tries to get me to go...if I say no, who the hell am I to ***** at him if he were to go with another girl? If it was just some random girl that I don't know of his friendship with, I would be raging mad. But if it was someone I knew that he was friends with, I really can't say boo about it. Seriously, I really have tried to share what I like with him but he just says how it's not his thing. I have never given him a reason not to trust me. And sometimes, I just feel like he does not have all that much trust in me.