Have namechanged for this. Is slightly long too...
I have been in my current role in huge public sector organisation for nearly three years, minus 6 months mat leave. I've worked for this org for just over 8 years as a whole and been promoted once in that time. All is well in myself, I am confident at what I do.
A new line manager came in above me in April - this is his second post at his grade and (I think) his first where he has a team beneath him, although it's a team of one, ie me. I have been finding him unbelievably difficult, partly because two years ago he was here before promotion (ie same grade as me) and was noticeably immature then.
Don't want to go into too much detail on what is difficult between us - it involves him taking on a lot of the things I had been doing and not letting me stay involved, as well as criticising my abilities - but yesterday we had a meeting where it all came out. And then I decided to take a leap of trust and tell him something deeply personal, which I hoped would be useful in identifying why our personalities rub up the wrong way.
What I told him was that I have for a while suspected that I am somewhere mildly on the autistic spectrum, and that this could identify why I find it really difficult, near impossible, to read signals and read between the lines and all the other stuff which means that I don't "get it" in interaction with other colleagues. Also I wanted to explain that I need him to delegate work to me clearly rather than talk about things he's doing and assume I am deriving supporting work and deadlines from this chitchat.
Up to that point in the meeting he had obviously been nervous. He is a year or so younger than me and was really clearly not enjoying the 'confrontation'. I know this from visual clues - quivering chin, unusually precise and sentence-y way of speaking, and he was even reading a sort of script about all the issues he had with the way we are (not) working.
The moment I told him of my personal issue, he instantly became much more confident and settled. Ironically, even I could see the body language was massively different, he started smiling and stuff and told me back a story of how he appreciated when someone else (who he named) had a visual disability. So I am really worried now that he has a sort of a power thing. I felt really vulnerable and I am now terrified he is going to tell other people of my 'problem' and not sensitively.