Hi IWBF - what an old moaner you have ended up with. Sounds awful. I get a similar kind of nonsense with mine. I think many of us on here have partners that are interchangeable, and they wouldn't even notice if they were living with a different wife. They all seem to see us as a problem.
I am very pleased that you're here as you are in a similar longterm relationship as me. Having patterns and behaviour that have developed over such a long time makes our experience slightly different it has become that much more entrenched. Our expectations and tolerance levels are stretched - we are more defensive, more pessimistic maybe. I know I'm extremely angry with him. Our behaviour has changed to adapt to the way they treat us.
Like you I have learned to get on with life without involving him, simply for an easy life. This makes me feel very capable - I know for sure I can handle anything life throws at me. What I can't handle though is the obstruction that he throws at me at every turn, the distractions, the interruptions, the clutter, the non-commitments... I have left him alone for the weekend to sort some space for his stuff and he hasn't done anything.
He really doesn't get this at all. I need to make some serious decisions about how to get him out. He's sad and lonely, but we can't live together. I think I may just have to take the kids and run myself. I'm going to look at flats right now. I can't be arsed with the sidetracking and false promises that I know I will face. Moving out will be a lot easier for all of us. He can't sidetrack me if I'm not there.