signs for a break up

hi, if its a boyfriend-girlfriend relationship i think its time to break up when the relationship isnt working for both of you, when its becoming a burden adn you dont enjoy each others company anymore. in marriage its different,since marriage is a commitment and i believe you wouldnt marry a person if you dont love him/her. So breaking up is not an option for me. There maybe an argument which is very common but that is not enough ground for breaking up. An open communication should be maintain in the relationship always, each other should strive hard to and even harder when something comes up that threatens the relationship. trust and respect should always be present.