I feel so left out....?

Well one day me and my friends were talking about what kind of activities we should take and all of them went for stuff like makeup artist and furniture painting... While I am the only girl and the oldest in guitar club... I feel kind of left out, should I try to act like a actual girl and try to wear make up and skirts or should I just stay the same and be a tomboy. And now that I think of it I'm always the only girl in the guy's team! I wonder why..??? What should I do to fit in with the girls? I'm also in alot of sports and I'm also kickboxing.... What should I do to fit in with the girls??? I really really hate makeup and skirts. I can try. But what else should I do besides make up and skirts?