How can i know if i have autism?

Why do you ask?: Autism is a spectrum ranging from obvious, pervasive behavioral disturbances to folks who are simply more focused on narrow topics, prefer a low-stimulus environment, and perhaps less naturally good with people. Perhaps you really want to ask, "Whoever I may be, how can I relate more effectively to people, find the right kind of work and activities, and enjoy life more?".

Social Skills?: If you have a problem with everyday reciprocal social interactions to the point that it harmfully impacts your functioning, it's worth having a neuropsychological evalution. Is it hard for you to understand THAT other people may not think what you think, feel the way you feel about things or want to do what you want to do, ? That makes an ASD more likely than just social anxiety or other issues.