In this situation, you've done all that you can to make amends. If he isnt understanding and doesnt accept your apology, that's his problem. You've done your best
yeah and no begging
If he's really interested he will respond...try one more time and tell him what you just told us.
We all make mistakes...I'm sorry
Be strong and convince yourself he was weird all along and that he just changed his tune once you sussed him out!
You have done your job. Why bother ?