Friends need quarrels to improve the relationships. While going through the quarrels, we understand each other better. We don't born to be understand each other that well like we can read her or his heart, we need time. Same goes to love relationship. There are not only sweet and happiness but also bitter and sadness involved. A pair shouldn't be tear apart just because of the first mistake the another part does. People may change, everyone may change. But there will always be a reason. If a relationship breaks because of a change of the partner, then i think there will be many people getting divorce in this world? They will try to like the change over of him or her, try to accept the new one? May not only have one path to choose?