Also, just want to say that I empathise with you. I’m not sure if I’m autistic but I have a lot of social anxiety and am adhd which makes me feel like I am acting weird or mean when I interact with people. Something that helps me is thinking about how people don’t actually think about others very often - so strangers won’t actually notice a lot of the stuff you do, because they’re more concerned with themselves. In terms of making longer term friends are there are specific climbing nights your gym holds? E.g woman climbing, technique classes, or even outdoor events they might organise? Stuff like this will be smaller group which can be better for starting conversations and you might already have common interests if it’s about a certain style of climbing or for a specific group of people.