When you say “forgive him” do you mean that you’ll feel he did you no harm and he’s not that bad a dude, or do you mean you’ll stop ruminating and being angry with him? Because if it’s the latter, then your second-to last sentence basically says: “I won’t move on completely until I move on.”

Exactly. You won’t move on until you move on. There’s actually nothing in your way. Just give yourself some time to have the emotions you’re having, and gently remind yourself from time to time that it’s OK to move on now. Or later, if you’re not ready yet.

You were hurt. Don’t try to bludgeon your hurt into submission by insisting you have to forgive him. Just allow the hurt to pass through.