The hope is you, putting you first, I am not sure whether or not you two will ever get back together but concentrate on you and your grown children..
Sounds like you really loved this man, and now, he is involved with someone else, you may have even gotten your self worth from him..
have you ever made a list of good things about YOU, built up your self esteem..
I was hurt when my past relation ended..it is hard, very hard..
Slowly you will build a new life for yourself, i feel, these things take time
Feel free to write more; get it all out, you have come upon a wonderful website that supports, supports, and most of all loves