Lyric discussion by PhenixFIRE 

Cover art for Collide lyrics by Rachael Yamagata

I think this song is about a guy and a girl that keep coming back to each other, even though they are not good for the other... That the boy is the girl's fall back 'mistake'. Line by line being:

"I'll fascinate you for a while... in wait to please" < We'll have 'fun' together>

"Wake up to realize all I'd done... breaking strings... leave you undone." <She regrets what they did the night before, and so she tells him that they shouldn't have, and hurts the guy because he actually has feelings for her- and she just leaves him feeling heart broken>

"I will not stay if you ask me to stay, Do not ask me to stay because I will not stay" <She's trying to convince herself and him that she wouldn't, when they both know that she will- if he asks, and that he will ask>

"You resignation, dont simply file... Your love... What I wake up to find, All Ive done is unkind All youre gonna feel is untied." <Even though he was willing, and 'asked for it' /literally/ she still feels bad because she knows that she doesn't feel the same and she shouldn't have used his love to get what she wants because it ends up hurting him- and then her.>

"Why do we always collide, stuck onto different sides, why do we always collide." <She wonders why they keep doing what they are doing- knowing it's wrong. And that even when they are apart and are different they still seem to come back together and repeat past mistakes.>

That's just my reading, based on the 'parallels' I saw with my own life. If you're a twilight junkie this is Bella, and the boy is Jacob.