Hi Marjan,
I'm sorry that you are feeling so sad today. While I don't know the specifics of your situation, I sense your feeling of being powerless waiting for his call and I empathize. Do you feel overall that he does not make you as happy as your ex-boyfriend, or is it just that maybe you feel that he isn't a comfort to you when you're feeling down? Maybe you can write a letter to him and express everything you're feeling right now, but not send it. Perhaps in a few days, you can re-read it and see what some of the core feelings are mixed in with your current mood.
Hang in there - my thoughts are with you. The storm will pass.