Seriously? You can't do what is in your own best interests in the long run? That means you have an addiction to this man and the push pull that he does to you. Yes, an addiction. You do know how you overcome an addiction right? You do it by abstaining from doing the thing you are addicted to. Cold turkey withdrawl, nothing less.
You are not the only personal in the world that has gone through the pain of a breakup and as when you are withdrawing from an addictive substnace, the first days or perhaps weeks are the worse to get through so you fill your time doing things that are healthy and that will help you to withdraw with more ease. You can give into your pain for a day or two and cry your fking guts out, but after that you pull up your big gurl panties andyou carry on with your life and you don't let the drug you are withdrawing from overtake your good senses now that you're becoming clean and sober from it.
You go through pain every day that he does'nt give you what you want, each day he keeps you while not really giving himself steals a tiny little bit of your self-worth away from you, each day he gives you another hit of him after withholding your drug of choice (him) from you, you become more and more dependent and stagnated in your fear of being without... just like any pusher does to any of their buyers does.
Learn to love yourself enough to know that you can overcome this addiction. You can because we all have done it and we've lived to overcome and love someone who actually wants us the way we want them. Get the book The Five Stages of Grief and begin.