Who am I??

[beware_of_geek]

I'm afloat in the ocean trying not to sink
I'm a crack in the asphalt you walk by on the street
I'm a falling star you'll never see
The lash in your eye the I in team
I'm the lesson you'll never learn
The sickness that was never your concern
I'm the big suprise at the end of the night
The bridge in the gap the corner of your mind

So who am I?