You know what, you're fine the way you are, so don't try to conform to any one crowd. I fit in with several crowds in school, I was a drama club kid, I was in band, I was in student council, and all those things considered popular, but I didn't think I was popular. So really, don't change who you are simply because of the crowd.
The only reason I fit in with the crowds I did was because I just told the people, "I'm me and that's all I will say, just accept me for me." Most of the crowd in all the groups listed considered me who I am and didn't seek a change. Though my freshman year in high school was pretty bad, because of the factors of some of the kids who thought they were popular, then found out that I was more popular because the seniors liked hanging out with me more and also wanted to hang out. Truth of the matter is you would be surprised how popular you are when you don't realize it. You make yourself popular, not how those so-called popular people make you.
So stay strong on who you are and don't get upset too easily with that crowd.