What should I do if I genuinely have nobody that I consider as a real friend?
Why don't think you have any real friends?
I get along with nobody and I get overly critical of people very quickly.
You have every right to be concerned and mad about your situation. Not having any friends is tough, and it's good you realize why that's happening. You need to take charge right away before it's too late and it just becomes impossible for you to make friends.
Talking to a stranger about my dicomfort is not appreciated
It's great that you are aware of the problems that you have with making friends. It's important to know that you are not alone with that. Just take the steps to go out and meet people without being judgemental.