Sombyr

The disorder is schizoaffective, but the inability to express emotions isn't usually a big feature of it. It comes with psychosis. Usually, antipsychotics are all it takes to trigger your brain to start expressing emotions again, but I can't take a high enough dose to do that without serious side effects, so I instead deal with minor psychosis symptoms, like having to remind myself constantly that no, the order of my songs when I hit shuffle is not a secret message telling me the future, and also the fact that I can't express any physical emotions unless they're very strong. It also shows in my tone of voice, which is a consistent, flat, unchanging tone that I try to vary randomly just so people don't tune out my voice.

I can definitely adjust my words to express how I'm feeling better more often. The facial expressions and body language though I'm probably incapable of unfortunately on account of me actually having two separate disorders that make me unable to show physical expressions of emotion. Way back in middle school I was put in a special class to teach me both of those and I couldn't even figure out how to trigger the muscles in my face to actually make any expressions, nor was I even capable of recognizing the body language I was supposed to be mimicking even when it was described to me.

I see. I always just determined that by their reactions once they showed up, and figured all that mattered until then was whether they had any desire to at all, which was usually conveyed easily with single word responses. I didn't realize other people wanted to know your feelings beforehand.

I'd noticed the thing where people send repeated short messages, but I didn't realize that's why they were doing it. I think I'm gonna have to take a middle ground though and just leave the period off my last sentence while trying to stay concise. I can't stand being interrupted in the middle of a thought so I gotta get it all out in one message.

Ah, I think the hangup for me wasn't so much not understanding that they had different info than me, but that they wanted the info I had. Moreover, that they might feel differently about things than I did, and they knew that, so I needed to make sure they knew how I felt.
When I see somebody just respond "K." or "Alright" to an invitation to do something, that always made me happy enough to know that they were gonna be there because I figured if they didn't want to, they'd have found an excuse to say no. I didn't suspect that others might not just assume somebody was happy to be there the way I did. It's helpful to know I need to clear up how I feel in some way for them to understand that I want to be there and enjoy their company.

I never use emojis either, except specific ones for specific contexts (I.E. the hug emoji when somebody's having a really bad day.) People have pointed it out, but unlike other things people just view it as an interesting personality quirk of mine instead of off putting.

Yeah, it seems not everyone has an issue with it. It might be more of an issue with me because I don't often convey much emotion when I speak because I don't know how, so I probably sound dead an uninterested when I combine that with perfect punctuation. Thinking about it, I also make very sparing use of exclamation points, so maybe I just seem so dead and formal that it makes people think I'm not really into the conversation.

This is really helpful. I didn't realize there were so many situations people were looking for validation. I just assumed when they said something like that it was just to quickly let me know and "K." was all they needed.

Maybe. I actually scrolled back through the Discord we're in and only found exactly one other person who uses proper punctuation. Scrolling through my other Discord servers though and people use proper punctuation all the time. It does seem to be a thing that may be specific to this group.
Also coincidentally I actually did witness somebody send a message that was nothing but a single period earlier today, and the reaction was everybody briefly paused then continued on like nothing happened.
Whether it's a localized phenomenon or a wider one, it's still weird to me.

...Ooooh. I think that's what she was trying to tell me actually and I just completely misunderstood. That second example is a type of situation I used it a lot in. I didn't realize people needed to know how interested I was. I thought they just needed a quick confirmation.

That makes a lot of sense. I think I do notice patterns a lot, I just don't see the reason the pattern exists, so I can't determine if it's a rude pattern or a polite pattern. That's kinda what happened with "K." I saw people use it everywhere and went "Ah, I see, so this is how people talk now. I should do it too."

It baffled me too, but people have legit complained about this stuff to her and she's had to explain to them that I just talk like that. She has no expectation of me to change at all because she already understands my intentions perfectly well, but she told me simply because she felt I should know people were complaining.
As far as the period thing, apparently it's the last sentence I'm supposed to leave punctuation off of. I don't get it tbh. I mostly talk to people in MMOs and over Discord and apparently when I add a period to the end of the last sentence it makes people feel like I'm trying to end the conversation. It makes sense to me that people think that, given that every time I did it they'd just stop talking, but why they think that is a mystery to me. She said she thinks it's because they're just not used to it.