It's not for the weak.
It's not for the unforgiving.
It's only for those who wish to keep loving and keep forgiving even when their companion doesn't appear to be interested in the best you're offering. It's for those who want to participate in the cycle of unconditional love even if they have cease for season. It's for those who understand that they too will show themselves unworthy by their actions at one time or another and yet, they still want to be loved. Love is reciprocally unconditional and only the strong survive.
The strong take risks on those who are worth it regardless of the risks they took on those who were a liability instead of an asset and that includes the old creature of the one they're with right now.