Contentment

A happy man finds joy in what is his, not wanting something because someone else has it. He never loses his desire for what he has acquired. A discontent man finds fault in all that is his, forgetting his labor which was put into gaining what he has. It is not that the possessions of the discontented man has changed. The discontent loose the desire for the very thing about his possessions that made him want them in the first place.

Being discontent with what you have is a result of ourselves changing. This doesn't apply to just material possessions but also to relationships. Some say they have grown as their reasoning for changing relationships. We perceive growing older and lack of committment within ourselves for growing. But, growing up is realizing the fact that keeping a committment is the true growth.
Lack of committment to others results in a change in our hearts and minds. As love is a gift given for no other reason than it is ours to give, so is committment. Committment from one is not dependent on another keeping their committment. It is not a reward which is earned by another than is to be taken away if they fall short to your expectations.

The one who keeps their committment to another regardless of others lack of committment in return gains respect and leaves the one lacking committment in the relationship with humility. The uncommitted witness and learn from the committed the need for growth in their own life and heart.

Sometimes we don't realize that if we ask for conditions to be met for us to commit to something, we are not really committing to anything at all. We are only asking for someone else to commit to us.