It does seem like everyone is dating in some capacity nowadays. I remember when I went through my last breakup I thought "who is going to want to get with some guy in his thirties with no kids and plays games and reads comics and was in a relationship for over four years previous?". I lined up like ten dates in a month on social media and had a new GF ten years younger than me within two. The Internet is a terrific thing for dating.
I wonder the same thing, OP. It seems like every girl has a boyfriend or a husband. It truly does.
I have very little luck to begin with, and have never been in a relationship. I'm a good person, have female friends and have dated, and it eats at me inside constantly.