A friendship i once cherished turned sour.

He doesn't like feeling always in your debt for forgiving him- so he makes himself scarce.

I have been in a similar situation.
Just give him time.
If you push for answers chances are you will drive him further away.

He's a dick. Forget him.

It’s not easy I empathise greatly because it’s heartbreaking loving then letting go but sometimes it’s needed if only to love and appreciate each other more