No, this isn’t some ill-fated attempt to win you back.

I am genuinely concerned about your well-being. You can’t be happy with how you’re living right now, and you don’t seem to be enjoying life at all. I’m not even assuming it is because you no longer have me, but maybe I could help. I know its hard for you to believe that I still care about you after how you treated me, but you used to be my best friend, not just my boyfriend. So excuse me if I’m not ready to give that up.