Call the police.
yes.
No.In fact, that wold be eloping!
no
No
with parent permission.
no, the parent that let the boyfriend move in can face child endangerment charges
no because you are considered an adult
with parent permission, i think so.
not without their parent's say so.
Call the police if that's minor age in your state.
With her parent's permission, she can live anywhere. Without it, she is at home.
You seriously have an 18 year old boyfriend? So while he works with colleges, you are getting new to high school? No, I don't recommend moving out with him. What will your parent(s) say? Think about it.