Solost, I am only a lurker here normally so I apologise for butting in..! I did write a couple of times before about my own parents and how my dad behaved like your H for so many years, keeping my mum dangling with little comments - literally word for word like your H.
Whenever my mum mentioned divorce (she was alone, my dad was with someone else) he would say 'oh but I don't want to lose you' or 'but I like telling people you're my wife'.
I just want to add here to what people are saying, about how wrong and selfish it is of him to say those things - you are obviously a calm person and want to get on with him - but perhaps anger might be healthy when he comes out with a comment like that. He isn't saying, dont divorce, I want you back - he is trying to stop you moving on, while he has completely moved on himself.
Regarding divorce, I think of it like this - a husband is a conditional status - it's not forever like a child or a parent. He is living with, sleeping with and loving another woman - that is the truth. IN those circumstances - how dare he tell you he doesn't want you to move on?
That is what he is doing - telling you he would like you not to make yourself free, then he goes back to his partner, while you continue to live the role of his wife, mother to his children in the house he wants you to stay in - for sentimental reasons.
People can behave in very complex and selfish ways. I know that people can be very selfish and can think they are doing the right thing. Perhaps he thinks that throwing you these little comments lets you know that he cares- then he gets to walk away guilt free to be with the woman he actually wants to be with.
Perhaps he is just incredibly selfish and it would make him sad to see you with someone else, even though he is happy (because he is, there is no doubt about that, or he wouldn't be with her) but that is then controlling and unkind.
I think divorce is so vital, because otherwise you are really allowing him to have a role as husband that is just nonsensical. He left, he is with her, why should he have the privelige of being your husband?
Its not for me to say how long someone should take to begin to move on after a marriage, that is so personal - and it wasn't even a year ago that you split, so I know these things move a few steps forward then some back- but there are things you say - such as questioning in a recent post whether he is really happy - that show you are still hoping he might come back. I think counselling if you haven't considered it, would be really helpful, to examine why you still don't think his behaviour has crossed a line from which you could not return.
I hope you can begin to look forward and see that while life hands us blows, such as the end of a marriage you had no desire to lose, we can go on to live totally surprising new lives, meeting new people and having new experiences.
You are still living in this man's shadow, I hope you can get some righteous anger burning at his attempt to stop you moving out of it (scientific term: having ones cake and eating it) ...and have a wonderful summer ahead.