Should I tell my bf I’m getting an abortion?

So we usually use a condom but sometimes he doesn’t and he has a bad habit of cumming inside me even when I insist he doesn’t. I talked to him a few days ago telling him I might be pregnant, he’s 100% against me getting an abortion even though he knows I’m in no position to having a child right now it just can’t happen. I just took a test and I am pregnant I’m thinking to get an abortion without letting him know... cause he’s not going to let me get one if he knows. What should I do??