Can I have some advice?

So um when I was around eight my Mom’s boyfriend sexually abused me and it’s really affecting my life still? Like no one knows expect a friend of mine and I’m to afraid to tell an adult because I don’t want everything to be brought up again, I just want someone to help me? I have really bad nightmares about it where I’ll wake up screaming and they happen every night unless I take medication. I feel like I can never get in a relationship with anyone even if I like them, I just get so scared. I have such a lack of self confidence that I can’t do anything that I really want to do. I don’t know, is there any advice anyone could give me to help me out a little bit maybe?