Some people just can't or won't understand what it's like to have panic disorder/extreme anxiety, so it's difficult for them to empathize. "Why can't you just get over it?" - like gee, I never thought of that. You don't just one day stop being a nervous wreck. It's years of building yourself back up and a big part of healing is having people who can empathize with you that you can trust. It sounds like he was treating you like a burden. Good riddance. He's not worth your tears. It's hard to see it now but with time you'll gain perspective and realize that he did you a favor. You are not worthless, you are not a burden, you are not so broken that you can't be fixed. You are a person, and you deserve to be treated like one. I'm very sorry you are going through it. It's difficult to not have a solid support system. Lean on your friends, family, or whoever you can. You are loved, you are valuable. Don't let that dick convince you otherwise.