I have a few issues,
I think a lot about what people say, I give meaningful responses. This gives a lot of blank air sometimes which can be insanely awkward.
I don't like small talk, I am someone who takes life serious. I don't care how your kid is doing, or how your dog is doing, or if your dog doing this generic dog thing is cute. I like to talk about meaningful stuff.
I don't mind social environments, and can carry a normie tier convo for a good 5 minutes before I start doing stuff like fidgeting, giving really bad and dead end answers that kill a convo, etc.
I also find social interactions mentally draining and will avoid them, and if I am forced into one will try and find an out as soon as possible.
I haven't been diagnosed with any mental disorder, but I also never go to the doctor and never speak on my issues with them because what's the point.