Maybe, although there are other possibilities too. A lot of people with high functioning autism or asperger's are able to function normally in certain conditions, although it can be tiring to do so. Difficulty with following directions can be related to autistic spectrum, but also could be something else. Feeling like you are from another planet is classic for asperger's, but also could be something else. Problems with social interaction and communication are primary symptoms. Did you start talking at about the time most kids do, or was there a delay?

You can hang out and see what others on the spectrum are like and just see if you relate, but if you really want to know then you need to see a professional who can evaluate you.

I hope that helps,
Rap