There are multiple definitions of both faith and commitment. One meaning of each follows and are the meanings intended for the discussion:
Commitment – The state of being bound emotionally and/or intellectually to a course of action or to another person or persons.
Faith – Confident belief in the truth, value, or trustworthiness of a person, idea, or thing.
Choices we make can be a single action, repeated actions leading to our behaviors, or a character trait to develop. We make choices just for today, and choices that last weeks, years, perhaps a lifetime. When we do not complete a course of action, turn an idea into reality, stay married, maintain a long-term friendship, keep a promise, or continue a healthy habit; we give reasons specific to the situation.
We humans tend toward being out of balance on this. Many of us tend toward justifying our every choice, action, and behavior. Many of us do the opposite. We tell ourselves we have been mostly wrong in our life with our actions and our relationships.
We will have discovered on our joyful pursuit of happiness, the truth is we either lost our faith or became no longer committed, or both. Sometimes it is the best path to take; sometimes it is not. We must be fine with that. Learning and growing from these experiences and building our integrity is the high road.