Who's Stopping You?

I've always felt this was from the perspective of an ex talking to their former lover again. Saying that he thought she said she was going to change for the better after they broke up, but it seems that in the end, the only thing holding her back was herself, because it's been a long time since they last spoke but she's still in the same place she was back then. She's so afraid of failing that she won't even try, and he's trying to tell her that as long as she sits still she'll never get ANYWHERE, neither failure nor accomplishment can occur when you do nothing about what you want. It's basically a guy trying to tell a chick to seize the day and stop fearing the unknown so much. The bit about watching "old reruns" says to me that while they're talking she's recalling pleasant times they had together in the past, and he's saying instead of dwelling on the past, building a future could be even better...if she'd just "step into the light" instead of fearing the "emptiness lurking" in her head that she fears.