What does it mean when someone says "that's wishful thinking"?

[Anonymous]

One of my sisters friends who comes to my house all the time always flirts and texts with me so my mom went and told her that she wants us to be together and the girl says "that's wishful thinking on your end lol" what does she mean by saying that's wishful thinking? All opinions will help

[Bethjo192]

That you are being optimistic toward what you want from her. But that she is not shutting you down, she might even like what you are suggesting. Just one opinion. May be totally wrong.

[acex0]

It means you aren't going to get it. She's not interested

[Book_Lover17]

Usually means it's very unlikely, or impossible. I think.