When/if he contacts you again (wait until HE does) tell him that if he's not interested in getting back together as a couple to please leave you the fk alone so that you can do the mental work you need to do to get the hell over him. Then, do not respond to anything he sends you unless it says he wants to reconcile with you.
Get on with your life keeping busy doing fun things with friends and family and forget he exists. No expectations and one day at a time getting over him if he doesn't want to reconcile. You'll be fine once you take back your personal power out of his hands and into your own.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion