You won't be happy going back to where you lost happiness!
The art of letting go: it's definitely a tough skill to master. We as humans are emotional beings who are often led by their feelings and not by logic. So often we meet people and life seems to be going so well but we all know nothing lasts forever. I have found myself talking to friends of mine who are in relationships that are struggling. I am convinced that the longer we hold on to obviously failing relationships, whether it be family, friend, or spouse, we start to lose ourselves. I know it takes courage and strength but at some point we have to move on and live our own lives, but all too often we sometimes go running back.
A long time ago a teacher told me that people don't know what they like, they only like what they know. I believe that to be true in all aspects of life. I believe that the reason why some people go back to these broken relationships is because that is what they know. People would rather continue to struggle than step out on their own and move on. It is so hard for some people to just give it all up because they might be afraid they may not find something better. Some people equate comfort with being content and it shouldn't be like that. We should have enough belief in ourselves to know that it will be okay, that we will be okay to move on.