As soon as I hung up I changed his name to Do Not Answer. And then my phone accidentally called him when I was closing out the contact screen! Smh I will get past this. At the moment I will sulk on the couch for a while and watch episodes of The Office. But these feelings will go away and I will be fine.He's disturbing your peace so probably best to go no-contact. Delete/block if you have to or change his number to Do Not Answer. And get back to doing things that you love.....time for self care in overdrive!!
ETA: I came back to add that I was feeling exactly like this when I ended my long term relationship in December 2016. I felt so guilty and awful even though he had clearly checked out of the relationship. I hate being the one to end things and being the bad guy I'm realizing. I'd much rather be dumped so I can feel better about things and move on easier. Anger is easier than guilt and sadness. I discovered this about myself in therapy and it's something we're digging into a little deeper.