Why do you hurt yourself more when someone else has already hurt you?

Cause most of the time, if that person means a lot to you, and if they hurt you bad enough, you're likely to put yourself down, and stress over the situation. Whether it be overthinking the situation, or making the situation worse, and in turn, making it harder on yourself.

Because you feel like you may deserve it, that this person acted this way with you because you did something wrong, or even said something wrong, so maybe being treated like that is what you deserve. You can also not be used to get affection and a healthy treatment due to past relationships or even past friendship. Sometimes we get closer to people not healthy for us and we don't want to let go, so we just let them hurt us until either the friendship ends or that you are too broken to do anything. Anyway, you do deserve to be treated right, you are worth it