I've always been very introverted, but I don't know if that's it. I feel like I'm different from everybody else.... There must be a way to put me into words.

Here's a list of things that people tell me:

*They think I am gay

*They say I act effeminate but nerdy

*I say weird things

*I seem stressed out

*I'm not manly (related to the first point)

*I'm shy

*I'm socially awkward

Here's a list of observations I've had about myself

*When people meet me, they seem to love me, seem to think I'm funny

*When people get to know me, they talk to me less, fake laugh at my jokes

*I genuinely enjoy spending time alone, and always have

*I only enjoy spending time with other people if they seem to be genuinely enjoying my company. BUT when they do seem genuinely happy with me, it's one of my favourite things to do

*I need to spend time alone doing nothing after a long night of socialising

*I either get really talkative or have nothing to say when I know someone well.

I could go on, but I'm going to stop there for now. Is this autism? Online autism tests seem to always diagnose me as not autistic. Am I socially anxious? These two mental health disorders have been my focus so far but I am just not sure.

Thanks

EDIT: Formatting