How do you let go..?

My boyfriend and i are really close to breaking up. I keep talking myself out of it. I need to let go because he’s no good for me. I just can’t though. I need strength but i don’t have any. I feel like dying because that just seems so much easier. I also have a lot of other things going on rn. He’s the only thing that keeps me sane and keeps me going through life. I’m so confused right now on what i should do. I just want to be happy right now.