I'm an NT, although I sometimes wonder if I have Aspie tendencies. These days I feel reasonably comfortable in social situations. But when I was younger I was very uncomfortable. The weird thing is, people didn't really see how insecure I was and just thought I preferred to not socialize a lot. I spent a lot of my youth and early adulthood observing and trying to figure out the ins and outs of social interactions; watching small groups of people and how their friendships formed. I always felt like there was some kind of secret code that I was not aware of. I spent a lot of years in and out of therapy trying to sort things out (I had a very unstable home life as a child).
It wasn't until my mid 30s that I started to feel more comfortable socially and kind of discover myself. The weird thing is, I was able to do this because of being with my Aspie partner. When I met him 20 years ago, I could tell something was different about him, but he was very social. He had lots of acquaintances, but I came to find that he had no real friends. He would have large parties, which I was not at all accustomed to. During these gatherings I found that I was actually pretty good at socializing, which was a big surprise to me.
After a few years when my partner and I moved in together I got to see the real him, and he was much, much quieter, almost reclusive. And then he let all of those acquaintances slide away. It seemed that his Mr. Social personna had all been an act. By this time I had discovered myself socially and was more willing to get together with people; and he was just doing the opposite, preferring that it just be the two of us. I think he was at the age, mid 40s, where he just decided it was time to allow himself to be who he was, which was someone much more introverted.
Today I am definitely the more social one. We do have parties and dinner gatherings, which I mostly initiate and plan. He goes along and does reasonably well. But ultimately he would be quite content to lock himself in his office and read or doodle on his computer.