Don't look back, do not turn around, keep going. Walk. Forward. You can do this. You don't need him. You don't need that anymore. Think about the heartache. The panic. Save yourself. You deserve to be happy. You deserve so much more. You are not doing anything wrong by trying to be happy without him.  Just keep telling yourself these things so each day gets a little easier. One day you won't be sad when you think of him. One day you won't think of him at all.