Lyric discussion by residuum 

Cover art for Over lyrics by Jimmy Eat World

"Your attention is attention, It doesn’t matter if it’s fake or real. Ill take it if I get it"

That line makes me think that this song is not about a past relationship in the traditional sense. If you've ever had to explain your relationship using a couple sentences instead of saying "My boyfriend/girlfriend" you know what I mean. Perhaps the girl was leading him on, showing him attention, was using him. But he dug her so much that he didn't care. And now without her he just hates life, and hates that he let someone do that to him. My two cents.