How would you react to this?

DUDE, IF SHE DOESN'T REGRET NOT CHOOSING YOU, YOU SHOULDN'T WASTE YOUR TIME WITH HER. And if I were her, I'd probably try to do sh*t, because she sounds likes the type of person that doesn't realize what they got, til it's gone. And if she'd tease you, when she likes you, and keeps you in the friendzone, she's probably very insecure. You don't need her, and she doesn't deserve you.