How to move on from a break up?

I just broke up , I have been crying after he hang up the phone call for like an hour. I feel like I give him everything and planned our future together but today it has crashed down. He keep saying that he tryna replace me with his ex and talking about the time he fucked with another girl or the way he want to fuck with another girls so bad while he’s in a relationship with me. How to move on with a person who you still love? I feel like I will have a heart attack when he said we broke up..
How to move on from a break up?
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