Yeah. I'm single, but not worried about it at all.
I'm... 'physically close' with enough people that I'm not worried about that particular aspect of human relationships.
I'm 'emotionally close' with enough people that I don't typically feel 'alone' or anything like that. My friends and a few members of my family are the most important things in the world to me. Being in a relationship, to me, has always just been... Showing that I'm emotionally closer to one particular person. I'd say three of my ex-girlfriends are still on that level - I care for them deeply and would do almost anything for them, but the relationships didn't work out. Not compatible enough or whatever. But I don't currently feel that huge initial emotional attachment to someone at present, so I'm single.
I'm commonly called an ashole and/or whore for saying it, but I really am just interested in having sex. If I can keep doing that, I'll be fine. If I find someone that I have more of an emotional and mental attraction to, I'd be just as fine. Maybe even better.