Can I get arrested for marijuana if my friends are taking it but I'm not?

Yes, actually you can. If you are in the room with them, or even in the same dwelling, you can be said to have "constructive possession" of the marijuana. My advice is that you leave any party where drugs are, and that you find better parties. Plenty of great parties have no drugs at all.

Legally you should not get arrested, but if you are hanging with dope dudes, most likely you'll get arrested too and is going to be your credibility against the cops. Most of the time the cops credibility will be more convincing to the judge and jury. Will cost you money to hire a lawyer and you can even face jail if nobody believes you was not doing nothing wrong...! THE MORALEJA: Do not hang with dope dudes...!

No you wont get arrested.

the best thing to do is stay in the house and go to a room and chill until the cops leave, they usually do. and if they come in the room you are in just tell them that you are spending the night there.

no unless the cop wants to be a dick