If you're diagnosed with SPD or have schizoid tendencies, do you ever feel lonely or alienated?

I'm not sure if I ever feel "lonely"; however, I do feel alienated when I'm out and see families and friends hanging out with each other. It reminds me of how much I feel "different" from others. When I see people having relationships with each other and enjoying their time together, I think to myself, "How do they do it?" I think therein stems the feelings of alienation.