Wanting to make that call ..

The worst feeling ever is to want to phone your ex immediately after you break up. wanting so badly to make them see how much you're hurting. I get itchy fingers, wanting to text them 24/7. I sit and wonder if they're thinking about me .. And hope he'll call me begging for me to come back to him.
But I know it's not going to happen??
How the hell do I deal with this?
Why isn't he phoning me? He loves me with all his heart and he's told me that. It makes no sense.