The guy is massively toxic to you. Why do you want to keep that around? Just cut him out of your life. Someone like that isn’t worth anyone’s time or your second chances. It’s like he genuinely wants to hurt you. Both by rubbing in the fact that he graduated and also destroying any of your chances at succeeding your business. Fuck him.

That is unless, you’re not telling us the full story and you’ve done something to him. Then maybe you can understand why he’s going out of his way to hurt you… Either way that friend isn’t going to work.