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Novel advice, Aquizzar. Vector, something that I find helpful whenever I'm in an awkward social situation or trying to integrate into a new group of people is to just be the quiet observer for a while. Just watching other people interact will help you feel what is considered normal behavior. I mean, don't be the person who never talks, just limit yourself to short, polite responses at first. Once you observe a group of people, you can find out what is the norm for that one particular group. Once you interact with a few different groups, you can sort of average it out to get a feel for what society expects as normal.
If you're just "there" in a group for a while, even if you don't participate in their conversations a lot, they will just slowly accept you, making it easier on you when you start actively interacting with them. Oh yes, and smile often. If someone makes a joke, no matter how stupid, smile. It will help you feel more relaxed around people and make them more accepting of you.
That being said, I think you just need a little more confidence. I don't think that most people are as judgmental as you seem to think. From the infrequent interactions I've had with you, you seem like a perfectly normal human being who is capable of carrying a decent conversation. Just be more confident, more loose, and it's okay to be weird.