Not me and my mom anymore

Everything has always been me and my mom. My father died before I was born. It's always been just us. She went out on dates but nothing ever worked out. Well she met a guy a year ago and she's been with seeing him and he proposed and asked us to move in.... My mom said yes. We moved in with this man over a month ago.... And he has 7 boys.... I'm completely testosteroned out. Well there were actually multiple reasons we moved in. Our apartments were in the ghetto and we had rats and roaches. He had a nice house but I have to share a room with one of his son's... So they put me in the room with his gay autistic son who's a year older than me. Honestly he doesn't really talk. He's the quietest out of all the boys. The rest are just so loud and it feels like there isn't any privacy. There is one bathroom and it's always gross. 12 year old "Step brother" was using my tampons every time he got a nose bleed". I feel like I get no alone time with my mom. They also lost their mom so they are all hung up on mine. The step brother I share a room with never leaves his room except for school so I can't have privacy in there. He's a huge loner. I'm trying to get used to this it's just hard.

Edit: I'm not sure how I would separate my room. There's no other rooms in the house.