I could be wrong, but it sounds pretty obvious to me that she is pissed at Nina for leaving they band and its not going to stop her. And she wants Nina to feel bad about it.
"She didn't get it so fuck her" Nina didn't get it that this band meant a lot to Louise.
I want you to want me
I need you to need me
I dare you to ditch me
I beg you to miss me
She also really misses Nina and wants her back besides the bad blood between them.
I could be wrong, but it sounds pretty obvious to me that she is pissed at Nina for leaving they band and its not going to stop her. And she wants Nina to feel bad about it.
"She didn't get it so fuck her" Nina didn't get it that this band meant a lot to Louise.
I want you to want me I need you to need me I dare you to ditch me I beg you to miss me
She also really misses Nina and wants her back besides the bad blood between them.
Just my take on it ;)