I can relate to everything you have said. Those constant phone calls at all hours, wanting to pick up the phone but knowing it would be pointless and you would end up right back at zero again.
I haven't heard from my exabf for over a year now and although I think of him from time to time - because he was larger than life and so very interesting and entertaining, I am glad that it is over and done with.
I have a new love in my life now and what a difference it makes to know that the man really loves me, looks after me, would move heaven and earth for me and who takes all my problems as his problems.
The contrast between my ex and my new man is like chalk and cheese. I love and respect my new love and it is a healthy love relationship. Like a breathe of fresh air compared to my old life.
So keep going and leave the past behind you.... it just gets better!