I am under 18, can i live with people that are not related to me? Are they aloud to be legal guardians?

You need permission from your custodial parent and if that is both then you need both, a letter giving control to the other family should contain authorization for schooling and medical it should also be notarized by a notary if all of that is done you are good to go or the couple can file in court for custody and a judge will make the determination or if you are 16 or older you can file for emancipation of minor status and still live with them.}{