Help pls

Okay so I have a huge freakin problem. So I'm 13. And i recently switched schools. And I've only made 2 friends so far. But here's the thing. They are so freaking cool. One of them has a belly button piercing and tattoos, and she's awesome. The other one smokes weed and drinks and she is also cool. I'm not friggin cool. They only accepted me into their groups because I seemed cool. I don't smoke, I don't drink, I don't do sex, I am not one of them. But I'm finally fitting in, and I don't want to become an outcast, so should I just keep acting cool?