yes. Autism is a massive spectrum. Everyone has it just some more than others. My son is on the big end of it and he will have to be looked after all his life. I have Attention deficit disorder which is also on the spectrum and I lead a great life with lots of friends.
not usually......but it can be done
Autism can manifest itself in different ways. Some people with mild autism are quite good at socializing...or at least do so with an average amount of ease.