It sounds to me like he's pretty much made his desires known. He wants some peace and wants to be left alone for a while. He was ready to just end the relationship but you talked him out of it. Not to sound harsh, but repeatedly calling and texting when he doesn't respond sound like maybe he's feeling a bit smothered.
Whether he is drinking or not is really beside the point. You are feeling upset and hurt by his behavior and actions. Maybe you should just step back for a while and give him some space.