I can't get over my ex after 7 months. We broke up on good terms but then after having sex with me, he did something very selfish and humiliated me. I got no apology and he cut me off. What do I do?

I understand that breakups can be very hard. And when we don't get a proper closure it gets even harder. But you should focus on yourself and move on, an apology is something you cannot ask forcefully. Keep yourself busy, hang out with friends, enjoy your life and let it go.