how can I get along with people are to immature?

First of all, don't worry. It's perfectly normal for good friends to have different personalities. :)

If this childishness is causing tension between anda and your friends, I'd suggest anda focus on what anda do have in common with them. What hobbies do anda have? What TV shows and musik do anda like? Find a common interest and take it from there.

Being mature does not make anda "lame"! It's important to just be yourself. If anda spend your teen years pretending to be someone you're not, anda will regret it when you're older, so be true to yourself. If your friends try to pressure anda into changing your personality again, try asking them, "why can't I just be me?" It might not seem like a very complex question, but it might help them realise that trying to change who anda are is wrong.

Think back to how anda became friends with them. anda mentioned that anda pretty much get along, and that's good! So, why do anda get along with them? How did anda become friends in the first place? There's obviously some reason anda two can get along well, so focus on that too.

So, long story short: find common interests, remember why anda are friends in the first place, and be yourself!

Good luck! :)