*random guy walks in*
Girl: wow i think i want to have sex with him
"Ill think Ill kill myself, thank you."
She doesn't want to remain friends -- it's just a throwaway line to make the guy feel a bit better than a piece of shit.
Cathy: John, let's just be friends.
John: OK, that means I will have to kill myself.
1. I don't want to date you anymore
2. I am interested in dating someone else
3. I am already dating someone else, and I need to lose your sorry ass.