To be honest all of the above arguments we have had a million times before.
I said that the problem was that this time is different, I feel like we are on a rollercoaster and that there are brilliant times but then each time we plunge down it hurts me a little more and that the accumulation of that hurt is too much now and I want it to end.
I also pointed out that even if the arguments or silences don't affect him much they affect me deeply (for example after we had talked about my birthday weekend in December, he went off whistling whereas I couldn't sleep and was very upset for several weeks).
I also pointed out that at no point did he apologise for his behaviour over the weekend and that the least he could have done was reach out to me when I had said I was grieving and feeling alone.
Also I pointed out that we were not at all "a team" in this relationship and that little things set us off when in fact we could be turning to each other (this in reply to there being no real problem in our relationship and everything being normal).
For example when we got back from the weekend away, my tyre was flat, and he stormed off to the waiting room and left me to do it, refusing even to call one of his friends who lived nearby.
For me in that situation we also could have laughed about it being an annoying end to the weekend and thought together how best to fix the problem.
There was one point where he was quite tender with me, stroking my wrist (I wouldn't let him get any closer).
I told him several times that I am tired of all of this and can't fight for our relationship anymore, something is broken.
But then he finished by saying, well "good night".
So I said, that's it, it's over, good night?
He said, well we'll have a talk tomorrow about how we can make things better for you.
I said, I don't think you have understood, I can't do that anymore, we need to talk about practicalities and tomorrow I'm out til mid-afternoon.
He went to sleep.