Since the day that I was introduced to my man's friends, despite being naturally an introvert, I've tried coming out of my shell and getting to know them.  Whether I thought they were immature, hardly sober or whatever, I pushed all personal judgement aside and did my best getting along with them because these people are obviously another part of my man's life that he considers important.  I've known most of them since 2008.

What really gets me though, is that I've been trying to maintain a positive friendly disposition and giving it my all to my man's best friends, but I still feel like they just generally dislike me and I feel excluded when I hang out with my man and them.  One of the best mates, a guy, isn't all that bad and just seems quiet.  His girlfriend who happens to be the female best friend of my man however, seems to end up talking to my man a lot more than her boyfriend and I do in a single session.  So I guess I feel a bit annoyed by that on top of her pretty much blocking me out or excluding me each time.  My man says it's her personality, that she's a hard person to get to know.

I guess part of my being peeved is

A) I seem to be doing the best I can to get along with these people who don't seem to be doing crap in return,

B) My man doesn't seem to do anything about it like talk to them and tell them not to be so closed instead during an argument once, he said that I was the one who was 'standoffish',

C) I've done everything I can, which is seriously saying a lot from a introvert

D) Who the hell does she think she is, blocking me and cutting me off from the group pretty much every freaking time?

Is there anything more that I can do?  Should I be jealous or annoyed in any way by this female best friend?  Am I taking this whole thing too seriously?  Should it or should it not matter whether your SO's best buddies accept you or not?