Learn from your mistakes?

Imagine you and a friend are walking down the street and a car is about to hit your friend… what do you do? Your natural instinct would be to scream or push them out of harms way. We care about our friends and we’d do what ever we can to prevent them from getting hurt by a car. Does that same idea apply to relationships? If the “car” is a bad relationship, is it our job to prevent our friend from getting hurt? We’ve all seen it happen, your friend is dating someone that you believe to be potentially harmful, what do you do? Do what you can to prevent them from getting hurt or just stay quiet and wait to pick up the pieces? I understand that life is about learning from your mistakes, but if someone else has already made that mistake can you learn from theirs or do you have to make the mistake for yourself? Can you learn from other people’s mistakes when it comes to matters of the heart? I’ve seen it first hand that a friend has made the same mistake time and time again, and at first your instinct is to make sure that they are happy and when the pieces need to be picked up, you are there for that. But there comes a point at which you are tired of seeing them hurt and you having to pick up the pieces. Does that make you a bad person? At the end of the day there are some instances in which you can’t help someone if they don’t want to be helped.