Moving out ? Feedback pls

Esperanza
Okay. I'm seventeen. I live in Texas and I currently have a job.  I am really wanting to move out because I absolutely hate living with my family. We have no communication, my brother(22) and his gf have been stealing from me. And I just don't feel comfortable being home. I have a place in which I could go, which is my bfs house. But idk if I could legally move out with out consent. And if I would get in any trouble with my 21 year old boyfriend. He had just turned 21 last week and the legal age difference is 3 years ? Please help me idk what to do.