My only tip for you is to stop thinking about him. Thinking about him won't do you any good, so stop torturing yourself over him

. I'm going through the same thing you are, and i told myself, while i'm busy being sad about him. He's moving on, and doesnt think about me at all. I'm just out of his life.
So i should relieve myself from the pain, and try my hardest to make myself happy. And that is to stop thinking about the ex.