A confession about how a person who loved something self destructive (in this case, getting their heart broken) was forced to break the addiction on their own, and found that in doing so became significantly stronger for it. Now he encourages everyone else to break free on their own, and find that hidden strength they always had.
Another interpretation is that even if it seems like you have no one on your side, or just no one to turn to, yet you are continuing to survive, you're proving to yourself that you do have the strength to make it on your own!
A confession about how a person who loved something self destructive (in this case, getting their heart broken) was forced to break the addiction on their own, and found that in doing so became significantly stronger for it. Now he encourages everyone else to break free on their own, and find that hidden strength they always had.
Another interpretation is that even if it seems like you have no one on your side, or just no one to turn to, yet you are continuing to survive, you're proving to yourself that you do have the strength to make it on your own!