how can I get along with people are to immature?

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

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

Being mature does not make bạn "lame"! It's important to just be yourself. If bạn spend your teen years pretending to be someone you're not, bạn will regret it when you're older, so be true to yourself. If your Những người bạn try to pressure bạn 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 bạn are is wrong.

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

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

Good luck! :)