"She's a girl- yes that makes a difference because she could go anywhere and ask a random good looking guy if he'd want to sleep with her and chances are the scumbag will say yes."
and you think that's really happening now? I doubt it.
"she probably gets hit on several times a week so she's probably not even worried about that stuff"
Another fantasy!
I think this is more about your anxiety about being alone and not knowing what the future holds. Btw, women re-marry far less often than men do after divorce. That could be due to choice though, who knows.