Been there! Sorry this happened. 🙁
Don’t worry about that douche bag if all he wanted was one thing. He never cared unless he got what he wanted and that’s selfish. You’re worth more than that and I’m sorry you had to deal with that.
You have every right to let yourself feel whatever you want to feel. I have been there quite a few times, and it sucks. Try your best not to ruminate on what couldve went better, or what you could've done to prevent whatever happened from happening. I have been dealing with the repercussions of a breakup since January, and its still rough for me. Cut off contact with him for sure! And if he tries to come back into your life, don't let him. It'll only fuel the ocd