This is a pretty broad question and there are many answers as others have pointed out. From my experiences and my knowledge, I would say that socializing with NT's are almost a must in order to get around with important things in life (job, education (if still in school), getting around in everyday life) and even though most of them might not end up being a "good friend" they are still good acquaintances, and Fnord is pretty much correct in his response.
As far as getting closer to other Aspies and those on the autism spectrum, there are pros and cons to this. I have another Aspie friend when I was in college (before he dropped out and transferred to a different college) and while there is some sort of social bonding to a level, there are drawbacks as well. While him and I both share similar interests and characteristics, sometimes we do get on each other's bad sides and often end up in resentment for a short time, and also trying to reciprocate friendliness. Sometimes, two loners might not make a good friendship due to the fact that if neither one is willing to open up then they both part ways in their own solitary lives. I could go on, but this is one of the experiences I had.