People change, at a point, people change but in most cases, it's not because they want to change, pain forces them to change. Frustration, anger, broken hearts, broken souls, when they no longer trust, when they no longer have any expectations from anyone or the world, constant betrayal makes people change, it makes one with a softened heart become cold-hearted, the fragile timid ones becomes indifferent to protect their selves, to protect themselves from the same hurtful feelings, people change not always because they want to, but because they are forced to.