I just thought it was because she was crazy.
Could be. But also she could just be one of those people who this sort of thing is just a game to.
"ooh he's got a gf, lets see if I can crack that" - woot, 1 point to me!!!
"okay lets go for the 'i love you'.." - woot that's gotta be worth 3 points!!
"wow, i'm really good at this"
"haha he's in the shower crying, lol"
"oops better do some fake tears coz like, i'm on tv and stuff"
"you won't have to face anything alone Lawson.... lol, yeah right.."
"oh he looks like he wants me to give him sympathy, better twist this conversation around so it's all about me instead"
Those people are out there. It's all a game to them to try and manipulate people and their feelings, for no other reason than their own ego and/or amusement... they're not always 'crazy', they're just incapable of understanding why their behaviour is wrong, and are completely devoid of empathy for those they hurt.