Sorry for your situation. You are in the shits. His behaviour is absolutely not correct. Anal, bdsm, three some against your choice? Like what? How did it get there? Just because you lost your housing? You need to leave. I don't know about your country but are there shelters for people who have lost housing? You need a job fast. Even if you can get a mcjob, you can rent a room. From there you can start building your life. It's going to be hard but not as hard as staying with him.

You seem to have issues caused by your parents. This can be hazardous if you go into relationships unawares. The guy you look up to is a user. Get away from him, fast.