Do I tell my boyfriend about past abortion

I had an abortion at 18 from a previous relationship that wasn’t any good. I’m now 24 and in a new relationship that is better. We talk a lot about sex and not wanting kids until marriage and I just don’t know if I tell him or not. Only reason why I’m thinking about it is because if we were to ever get pregnant when we aren’t married I don’t think I would/could have another abortion. I don’t want to have any more abortions unless it’s bc of a complication with me or the fetus.