"I fall to pieces" - You're trying to get over your ex, and be "friends" (pffft), but everytime you see them you have a complete breakdown and feel totally pathetic.
"Walkin after midnight" - You spend your nights searching for your lost love on foot.
"She's got you" - You still have all of your ex's stuff... but you don't have their heart :(
"Sweet dreams of you"- You're having recurring (sexy?) dreams about your ex.
"If you've got leavin on your mind"- You have a sneaking suspicion you're about to get dumped.
"Back in baby's arms" - You and your ex got back together! WOO! (subtext: yea... it's probably still going to be a disaster though...)
Happy Valentine's Day!