Trying to prove something
Sometimes your ego takes over, and somebody who screwed you over tries to come back into your life and you let them. Why? Because you want it to be “different” this time. They hurt you, so now you want to prove that you don’t care. Maybe you want to date them and date other people to show them just how unattached you are. Look: if you care enough to feel you need to prove something to an ex, the definitely still have the power to hurt you. If you really didn’t care, you just wouldn’t let them back in. Looking out for your ego and looking out for yourself rarely go hand in hand. Usually, while you’re trying to prove that you’re the strong one now, your ex hurts you the same way they did before. And you end up feeling infinitely worse than you did after the first breakup. You don’t need to prove that you “don’t care” now. No one is buying it.