Can u give me some suggestions?

ok, so am i being mean or riduclous about this? ok, so everyday, i hang out with my two friends, lacey and melanie and their friends. sometimes i dont really like to hang out with them. they talk about disgusting things, act crazy ALL the time, and they dont even talk to me very much. yes, i do try to make a conversation but it is really hard. like at lunch today, Lacy had her back towards me. the only time she talked to me was when she asked to eat some of my food, which was almost half of it. their good people, nice and stuff and funny. their fun. but idk maybe they dont like me. thiis happens almost everyday. also, people see this group as weird. and i want to join another "group" but then ill feel mean, and melanie is fun to hang out with. so idk wat to do! this group doesnt fit me at all, and it is keeping me from meeting other people. im soooo confused!!!!! sometimes i like to hang out with them, but then we sometime get made fun of. the group is the nerdy-weird type. and idk if im like that. idk im probably am :/ but i really want to join another group. i have some other friends in other groups, and i think i will rather hang out with them sometimes so yeah. am i being mean? or selfish? or what??? anyways, i know this is long. sorry :D but any advice would helps . thank you soooo much! :D