All those things that you wanted to tell him: empathy, being friendly, getting rid of your anger are all things YOU have to do.
Why are you asking him to help you with your emotions?
What sort of response would you hope for?
We can mind read about why he's doing this: to minimize his pain or hurt, perhaps he thinks the less he is around you the sooner you'll heal or move on. I remember saying to someone I'n glad we have to live apart this month (before he actually moved apart) I think we need a break. He needs to be on his own. But anyway all these things are theories and in reality it doesn't matter.
It's hard for someone to have a friendly relationship with someone if one person in the friendship is needy or desperate. We've all had friends like that.
Work on you. But also accept that you may never know why he acts/acted this way. He may never be nice and friendly. He may never come back. We don't know the outcome and we have to accept what's happening now.
