So sorry to hear about your pain.
I initiated a break up in December. I don't know what your resources are, but my break up coincided with a trip to a nice place for vacation; I would recommend it if you can treat yourself. I spent some alone time really using the situation to regain some of the balance I had lost in myself as that relationship ended. I came out of it stronger.
Also, if there's any "let's be friends now" talk, try to resist it until you've healed. You don't owe anyone your friendship until you are ready to give it willingly.
"Love takes off masks that we fear we cannot live without and know we cannot live within."James Baldwin