I've tried moving on, but everytime I try, I feel disgusting. Like it doesn't feel right to me being with someone else. I want to show him how much pain I'm in from all of this, and I want to be able to actually press 'call' after I dial his number into my phone. But I don't want to seem desprate to talk to him.
This is the vey reason you need to let this go. You want him to feel pain and he is not going to.
He left you and went to another girl and broke up with her. That has nothing to do with his feelings for you. He is moving on.
Continue NC. This will get better.