A good book that helped me during this process is Getting Back Together. I has a lot of exercises for you to do to get to know yourself better, what it is you need and also points out the postive things that can happen during a separation.
I ditto the no phone calls/contact with him. Dropping the rope seems to get some response from them. And, for me at least, it saved my sanity. I'd email him and then just sit and wait for a resonse and get broken hearted if one didn't come. But, if I didn't initiate anything, whenever he called, it would be a plus and I'd be as upbeat as possible and tried to follow the rule of always ending the conversation first.
This is hard, it is hard to have faith in letting them find their own happiness and trusting it will be you. But that is the best we can do, pray that they find the happiness they deserve.
When the impulse of contact hits, come to the bb to help you get through it.
You have done so much already with your life, I love your responses to Laurie, how about turning them into goals with action oriented steps. Something you could read first thing every morning?
Hang in there, you can do this and we are here to help.