Boys want to break up because they want to break up. It's no use keeping him. He has offered to break up, but he contacted you again. I think there are two main reasons. First, because you didn't contact him, he was disappointed and male chauvinism was at work. Boys always want their ex-girlfriends to love them all the time, and waiting for them to come back will make him feel a sense of accomplishment. Second, it may be because he doesn't have the right girl around him now, and he is lonely, so he came back to tease you.

I don't want to hurt you, but I don't think this kind of boy is worth your effort. He said he didn't think you were suitable, so what did he make you think before the abortion? You can find an excuse to say that he didn't know his personality was inappropriate at that time, but he had sex with you without even knowing whether he was suitable or not, which is obviously irresponsible. Don't let this irresponsible boy succeed.

Give him up. There are many good boys. You will meet better boys and love you.