Seeking expert testimony is a sign of strength. A personal relationship with a caring professional is proven clinically effective.
I believe that I can help.
I know that you are hurting very much and that it is hard to live with an injured heart. We have all been there, but every time it hurts. My sympathies are with you.
It seems that your recent partner has made a clean break with you. If he has been unhappy with the relationship for a long time, then it probably took him a great deal of courage to do what he did, and a great deal of thought as well.
Right now you have little choice about giving him space. If you contact him now you will probably annoy him and do more harm than good.
You could wait a few more days and then, after this period of thoughtful meditation on the past events, and based on what he has told you in words and deeds, write him a well thought out letter asking him to be honest with you and tell you why he made this break with you, and further requesting him to reconsider getting back together with you.
Because his decision was one that he led up to slowly, rather than succumbing to anger or a certain spontaneous urge, he may be adamant and not change his mind.
I'm sure it is not all your fault and he has his own shortcomings, one of them seeming to be an inability to communicate adequately. All you can do is give it your best effort.
In case this does not work, I would like to recommend a wonderful book for you which WILL help to give you closure as you move forward, opening a new and better chapter in your life, one that will bring rewards instead of heartbreak.
Do your best to try to salvage this relationship but understand that there is life beyond a breakup. It is good to have two plans so that if you cannot change things you can begin to move forward with your life.
I shall keep you in my prayers for success and for closure of your emotional wounds, one way or the other.
Elliott, MAE, LPCC, NCC, CCMHC