One person always holds the power in a relationship. If this person breaks up then he/she holds the power over the other person.

Most thing hurt in all of this not that we break up with them but the way they leave us

I think It's cause we create an affection make with that person, make you laugh,They usually give you an unbelievable amount of joy and when they've gone. We feel empty, sad, and it's obvious, but We always say a lie and it is: "I can't live without you" that's wrong We've all lived for many years before meeting that special person. So people come into your life when they have to come and leave when they have to leave. Sorry for my bad English, saludos...