He ended our relationship, will he come back?

In such situations I think its best to give it sometime, not more than a month. He broke up, you dont need this time but to assure yourself, you dont need more than a month. And then after that month you have no reason to hang onto him. MOVE ON. Plenty other fish in the sea, get to know them, you'll get to know their story and its very likely you'll be compatible with them more than your ex.