You won't know until you face it. You won't feel it until you take it. Answer; never. Take a risk is not a must but it's a choice. If you choose to take a risk it means that you brave enough to face it. When you have to face it, don't ever put it behind. That's called coward. Pff! What a nice word you've given to someone who once you loved. And now you're gone like nothing happen. Well done.