gvstate,
Thanks for taking the time to respond. Everything you mention has been clear to me for a long time and I recognise my own compliance in this problem. I think it is difficult for most people to understand the situation, as it difficult for me to understand why anyone would stay in any relationship that has brought such unhappiness, when there is no barrier to leaving? It makes no sense at all and I know I have a problem that needs to be resolved in some way. As you rightly pointed out, “there is something deep down and emotional keeping him tethered to this marriage”.

Kitt,
Thanks for the input. I sense the frustration in your message and suspect you understand my problems only too well but it sounds like you have endured worse. I have done a lot of research on personality disorders as I have tried to understand more about what has happened to me and why. Much of it seems to fit reasonably well. I wish you the best of luck in your recovery.