We all live together...too expensive to live alone..unfortunately

I don't hace OCD but there are two things I resent....deeply. A) Don't come to my place and tell me"" the couch will be better under the window"" and B) Don't tell me to be "diplomatic" with my words.

I am not OCD, but hae it when people move my stuff. I generally rmember where I put things, and it really makes me angry when someone moved something. The frustration level is elevated, because i am partially (legally) blind, and so chances are I wont' find something someone moved.

I'm not OCD, at least as far as I know. But it annoys the shit out of me when someone comes to my place and starts fucking with my shit. If you don't like it, gtfo, it's my place. I stopped inviting one friend in particular over because she insisted on changing the toilet paper so it was backwards, "Out of habit, because my cats attack it like this." Guess what, dickhead, i don't have cats and you need to hold it til you get to your own house now.

I hate it but not because of OCD, just because i don't want people i don't know touching my stuff

You can touch anything of mine as long as it isn't on my desk and you put it back when you are done with it. My desk because I already have problem with my filing why would anyone want to make it worse. Not putting something back where you found it is just plane rude especially if it is one of my tools.
I don't lose my mind but, I would be lying if I said it didn't piss me off.

I'm like that to a degree.
I can handle someone touching or moving my stuff, but not to the point of me not being able to find it.

I can relate to your feelings. I had the same problem with my partner constantly "tidying up" and then not knowing what she had done with things.

I don't exactly have panic attacks , but I would prefer they didn't..
I think that you may want to read a book "Dont sweat the small stuff,
AND it's all small stuff"