Hi, I'm 23 and feel like this is embarrassing.

My brother who is 28 is inappropriatly touching me.
This happened when I was a kid I actually told my parents and I remember them calling me a liar, and I started running away from home, I was brought back by the police multipule times, it got violet, and aged 12 I was put into care, and I felt like no one believed me in my family, he's the golden child of the family he can do no wrong.

I lost contact with my family while I was in care I know alot of kids have a horrible time in care but I actually loved it, for me it was being with my friends 24/7 yea we had rules, but every weekend we went out that's something my parents couldn't afford, they couldn't afford cinemas, days out, clothes allowance every month.

When I was 17 I started to get back into contact as I was getting ready to leave, I had my own flat until I was 21, which is when my mother started to get ill so I moved back in my brother moved back to town lives a couple miles away, and I hate when he comes over, if I know he's coming I have to make an excuse to go out, I'm scared to be in the same room with him while my mother is in another room I literally follow her like a lost dog just so he won't do anything, it's been going on for about a few months and I'm asking for advice now because he's moved on, like he used to touch my breasts, now he's moving down and I feel very uncomfortable with that the only person that is allowed to touch me is my boyfriend, and my brother has started moving my arm to rub against his penis, which has got me worried too, I leave the room immediately but idk what to say, if I tell my boyfriend I'm worried he'll attack my brother, if I tell my mother I worry it may make her ill for the stress and I don't belive that she'll belive me.

So I really don't know what to do, sometimes I argue with my brother over tiny things but I make it into this huge thing just so he won't come over or so I can block him and not talk to him, just to get that week of realif I guess.

Just saying this now I feel stupid because I know what everyone is thinking just move, I don't want to because I missed 6 years with my family and if anything happened to my mother I would never forgive myself for being selfish and not being with her, on the other hand trying not to sound selfish I don't know what this is doing to my health I feel ridiculous for not saying anything, stressed that I can't because I know no one will belive me, I don't know what to do.