Should I let my boyfriend keep me away from other people?

There was a birth complication when I was born. I wasn't getting oxygen, so my brain wasn't getting oxygen. I have partial complex epilepsy because I'm brain-dead in a small part of the brain. (I literally have dead tissues where functioning part should be.) My boyfriend of over 4 years thinks I have no filter and say whatever comes out of my mouth. He's been keeping me away from other people-- at least away from other people when I'm with him. I always thought it was because he's been too busy to go out a lot. (he owns 2 businesses and an accounting practice.) and he once told me he didn't like large crowds because he has anxiety. But he recently told me he doesn't want to be around me around other people because I don't know what I'm saying. It's been 4 years & I never figured it out until he told me straight out that he keeps me away and why he keeps me away. (my judgement is off, too.. sometimes I can't distinguish reality from what I want to believe-- & I can't read facial expressions-- which is why i don't know if i'm saying something weird)

Most of my brain works. I have an English BA. Math was my worse subject, but I finished it through calculus, and I'm studying for my LSATs for law school. My boyfriend just thinks I shouldn't be around people.

He says he loves me, and loves most things about me. He says that he knows there are some things he does that bothers me. I don't like him biting his nails, so I just nicely pull his hand away when he starts to do it subconsciously.

This is different. I feel like he's locking me away in a closet. Is this relationship even salvageable? We've talked about marriage, where we're living, kids, pets, money, etc. But now I'm questioning if he's going to try to "fix" me, "control" me, or just lock me up for the next 50 years of our lives.

Is this relationship salvageable? and Can I be "fixed"?