Hi all, haven't been posting in a while but have been semi lurking when I get a chance. Life has been busy and reasonably ok, fuckwittery-wise. He saw a counsellor for a while himself and it seemed to help. I knew things would degenerate again though and boy they have, with a bang.
Sorry in advance for the me post. 
Just over a week ago, he went out on some errands in the early afternoon. He never came home. Well he did, at 9am the following morning. He had been drinking for god knows how long and "fell asleep on so and so's sofa". I don't think he was with and OW or anything like that, he just partied too hard to think of his family - oh he did tell me via text that he was in the pub and had met so and so and would be home in half an hour (at about 8pm)..
So I went off on one completely for about ten minutes, then afterr I had calmed down I pointed out sensibly that he had disrespected me and his children, that he had treated us as if we didn't matter and if he didn't care about us and that he had acted selfishly. He agreed, grovelled a bit and apologised profusely.
We then went away for a week with the kids. I was still furious but trying to be positive. While we were away, FOUR TIMES he disappeared at some stage in the day or early evening and didn't come until late at night, drunk. 
On the first of the nights, I locked him out and threw his clothes outside. He managed to force a window open and threatened me verbally. So I didn't lock him out again.
In between, he tried to be nice and "spend quality time" with me, but obv I wasn't exactly warm to that suggestion so he would storm off again and end up going drinking.
I think my tipping point was on the last night when he came back drunk and said to our 4 year old "I am going to kill mummy and bury her on an island where nobody can find her because she is a stupid fucking c*nt".
So that's it. I don't think I can sink any lower than that. We are home now and he is all "we will go for counselling" but also "you make me so angry, you rile me, you are so frustrating, you are so stupid, you don't listen to me, etc etc". I don't even know what to say to him. He completely denies saying the above to our 4 yr old (our older child was also in the room, but he actually addressed the comment to the younger one).
So I suppose I just needed to vent, I can't tell anyone IRL what went on in the last week, I would be mortified. I need to get my head around what next.
I have no clarity at the moment due to tiredness (can't sleep much) and also the kids are ill which doesn't help. I wish he would just fucking leave. [cry]