I posted on here last week about my boyfriend's OCD and the effect it has on his appearance. I received some very helpful insights and it was really valuable in helping me to clarify how I feel about him, his "ishoos", what's important, what's not, and how to move forward. I've now namechanged (for reasons that will be clear if you manage to read below).
Anyway, we had another discussion about all of this earlier in the week, and I mentioned that I'd posted on here. He wasn't particularly happy about that, I didn't go about things in the right way, at all, and I came across as overly critical. We ended up arguing. I felt guilty and was very apologetic. Although I did also say how helpful it had been in clarifying my thoughts, and that I hadn't been unpleasant about him at all - on the contrary, I was very positive. However, this stressed us both out, and we went on to have a couple more "difficult" conversations through the week that we both found exhausting and upsetting.
I need to mention that as he knows I use mn, he's previously asked what my username is. I explained that this is a private, safe place for me, where I have asked for advice on things that I wouldn't talk to RL people about, so I didn't want him to find me. He (I thought) respected this.
Cut to Friday night / Saturday morning. We both acknowledged our respective parts wrt the tension of the week, agreed we just need to put it behind us and get on with enjoying each other again. DD was going for a sleepover Saturday night so we could do just that.
We went out for the evening, to an event where a friend of his was dj-ing. His ex-gf was also there with her LT partner, but we mostly spent the evening talking between ourselves, really enjoyed each other, and it felt like we were getting over the hump of the past week.
Anyhoo, quite late on in the evening, he went outside for a cigarette, then came back in with a big triumphant grin on his face, showed me his phone on which was my thread from last week. I was shocked, went quiet, and asked whether he'd read the whole thing. He said he had, and that while he was outside, he'd shown it to his ex-gf 
So here comes the AIBU: I was quite upset, intially very quiet, then asked lots of questions, tried to explain how important my anonymity is etc. He became increasingly angered by my reaction, became quite verbally aggressive. Eventually we left together, but on the way back to his house, he said he was going home alone and leaving me where I was (in a back street in a town 10 miles away from home in the middle of the night). No car, no public transport, and we'd both had a few (although we weren't drunk), so really quite vulnerable.
I waited five minutes, called him, tried to calmly explain that he couldn't do this to me, and that I needed to be safe. He agreed. We went back to his home, where he continued being really quite unpleasant and harsh. I was totally bewildered.
Sunday morning, I was very calm, again explained why I objected to his behaviour, and there was a reconcilliation of sorts. He later texted me to apologise and said his behaviour had been "inexcusable".
I asked him which bit, and he said the leaving me in the street, and the shouting "although I still stand by some of what I said, I should have said it more calmly".
So he still seems to think that stalking me on MN and sharing private stuff about the two of us with his ex was OK.
I don't. And I now have serious questions about the type of person he is. He has never displayed anything like this kind of behaviour at all. He has been consistently kind, supportive, generous, loving, understanding... it's all very confusing.
I do realise that I probably shouldn't have told him that I'd posted here for advice. Also that he wasupset because he'd felt that I'd been critical and over sensitive earlier in the week.
But it doesn't sound good, does it?
Thanks for reading this long ramble 