Well, I am like you OP, and I’m doing okay at the moment.
I, like you, have no single friends. It is lonely sometimes.
However, I am not jealous. I feel pretty excluded at times, but I wish other people lived more like me, I don't wish I was like them!
In theory it would be nice to meet the perfect partner (I will not settle for less).
It would also be nice to travel the world, drive a fancy car, buy a holiday home, win the lottery. I cannot have these things, and never will, and I feel OK about this.
So, I now get on with focusing on the things that I do have: I may ‘not have it all’ but my life is still a damn site better than most people in this planet, so I just focus on making the most of it!