People who are out of control desperately need to observe your healthy boundaries in-play to learn from your example. You best teach others about healthy boundaries by enforcing yours on them. There is a difference between giving-up and strategic disengagement. Know the difference. Learn how to let people go. Stop holding-on to the wrong people. Let them go on their own way; if not for you, then for them.
— Bryant McGill
post "Healthy boundaries"