Someone who makes you feel that uncomfortable or uneasy doesn't belong in your life. Cutting out the toxic people like that in your life in whatever way you can would be the best course of action. For example; deleting them from any social media so that they can't contact you. The best thing would be to completely avoid him entirely in person. But considering boys and the fact that you two had some history together, he might be feeling the need to humiliate you and make fun of you to feel better about himself. I've had a similar situation and blocking him in whatever way I could really helped. Stay strong, sweetheart. I honestly wish you all the best in this time of your life.