You could say, “Ditto, YOU’RE the other person on this date too, that makes TWO of us who are STILL single!” LOL!
I know exactly what you mean. They’re implying that there must be something ‘wrong’ with you if you’re young, attractive, intelligent with a bubbly personality. Oh yeah, that’s right, I must be a psychopath, clearly the only explanation. It’s not like there’s anything wrong with the enticing selection of available men out there! :-)