The Most Awkward

I'm single. I mean, SO single. I've been single for the better part of a decade. Longer even. My last serious boyfriend was in the year 2000. I have since dated and had flings and things, but nothing that I would count as an actual relationship. So in my opinion, this makes me the most single person I know. The Most Single.
Since sobriety, I've actually pretty much stopped dating altogether. Being sober means being cognitive when you're with other people and when it's new and forced, I become the most awkward. It's just not fun. So I don't do it anymore.
This freaks people out. I've met some super awesome people in the last few months, and they all said they wanted to set me up with someone. And I've pretty much turned them all down. I don't know how to function in a setting like that, so I just avoid it. I know, I have issues. A lot of them.
So this thing happened where I was in an airport having lunch before a flight. I was just sitting there eating and chatting with my cousin when I looked over and this dude was staring at me. He must have read a manual or something because when I made accidental eye contact with him, he slowly broke into this almost creepy smile. He was kinda cute, looked younger than me, and alone. I'm sure he was harmless, but I looked away quickly and then avoided looking in his general direction after that. Except when I was looking for our server to get the bill and get out. Then I accidentally made eye contact again and it happened again. He went from straight faced to this slow grin. It was so weird. We left shortly after and I never saw him again.
The thing is, I read a lot and there are always these cute meet stories and I'm always like, yes, IF I were in that situation and the guy was that hot, then for sure, this is how I want to meet someone. But in real life that doesn't happen. So say I was not me. Say I was a normal person. What does a normal person do in a situation like that? Smile back, for one. Then what? I don't get it. I'm bad at human interaction.
This may be a lie, because I have a lot of friends and family that I'm close with, and clearly I have no issues interacting with them. Let's rephrase. I'm bad at stranger interaction.
But you know what? I'm okay with that.