A lesson in love. Once he's embittered by love, the rest of the world seems corrupted. Past yourself forget the light, things look dirty when it's on. He wants to close his eyes to the world, because he sees only its filth now that he's been hurt. Now that all the good slips away, he doesn't seem to even recall what the good looked like when it was here.
I love how Rob uses the word good in his songs. Most poets are afraid to use basic words, but here Rob is talking about basic emotions. He doesn't' talk above people but to them. Having the "good" is important to Rob. He's not talking about the great or outstanding; he's wanting good. This comes up in "Back 2 Good" as well. Just to be even-keeled and to have the world revolving like it should.
In this song, he can't find people who'll treat him like they should.
The chorus is like he's waving his finger at this girl, [which finger? ; ) ]. It's a shame he feels like this because of how this one woman behaved, seems he's saying. In concert, he says, "this song goes out to the b**** who gave away all my clothes to Good Will." He obviously does not have fond memories of this woman. In the chorus, it seems like he felt like he fell into her trap, ("couldn't step by you"). And, in falling for her, he did fall.
Second verse indicates further that he's fine with the relationship being over. But he seems disenchanted with relationships totally, at least for the moment. He's like, what am I supposed to do, repeat this again, lik get yourself ready to fail again, because he can't think of anyone being good for him.
The bridge seems to be saying that he should have foreseen this ending. "So let the wind blow ya, across the big floor, but there's no one around who can tell us what we're here for." The "big floor" puzzles me. As in the party setting where you meet these people? As in life in general? Regardless, it seems like a big meeting place of people.
Again, he's saying how, because he's embittered by the last relationship, every girl's probably looking like the last one.