Act like a boy.
I know it sounds weird but that's the only way I can handle myself in the same car as my bro and his friends.
For instance, "OMG POKEMON RULES!!BLAH BLAH BLAH BLAH BLAH"
"I dont understand why piccachu is so amazing.. I mean, seriously charizard is beastling"
"oohh yeah i totally agreeee voiajfoaija[sdjopopadj[pasjodposjdapodj blah blah blah"
See just fit in with them, they arent so bad after a wile...