So Immature.

I'm in college and the last 2 years i've made some friendships and lately some new ones .But i can say i feel comfortable only with a couple of my friends.I know we're young and we're suppose to have fun but i just can't stand how incredibly stupid the guys can be sometimes.They're so immature and childish that i can't stand them.It makes me feel like i'm in school again. I wanna feel a grown up sometimes and talk like one but i'm hanging around with kids. And they act like kids , make fun of others or teasing all the time or I don't know how the conversation always goes around sex and if I say anything they'll laugh, I'm so fed up !!
I would love to just leave them but i don't want to be by myself, and i also like the two friendships that i've made and since we all hang out together I don't want to lose them.
Ughh, I wish i had made better choises in the beginning.