Your letter is not about your ex being a d*ck. If he were a d*ck, you would have stopped thinking about him by now. But you are thinking about him. Almost a year later, and you're reaching out to me, too. You said you shouldn't be thinking about him though. Has someone told you that? Often our friends do.
Fear. A four letter word that packs a lot of punch. This little sucker keeps us trapped, playing small and giving up on our dreams. It convinces us of a distorted reality in which we are the victim and only 'bad' things can happen to us. The continual monologue of all things that could, would and will go wrong.