Should I move in with him?

S

I want to move out and move in with my boyfriend and his older sister, the reason is obviously because I love him a lot but the other reason is because of my horrible home. My step mom has abused me throughout my 8 years that I’ve lived there and know that I’m turning 18 soon I want to take the opportunity to leave. May I have some options on this? You guys can be realistic as you’ll like.