Thanks again for your responses. Since I last wrote I have been offered an excellent job in another city (the one where I want to move to) however I am on a short time frame in which to accept. I have decided that this is my chance and I want to take it.

My problem now is that how do I initiate the breakup conversation in the nicest way possible? I know I am going to hurt him but I have let my chance go so many times (to end the unhappiness) and I dont want to continue to live my life with regret and sadness.

The anxiety is consuming me and I dont even know how to start the conversation, what do I say?