Can you determine the difference between fear of commitment and not having anything worth committing to? If so, what is your distinction? This can be commitment to anything. A job, relationship, person, dream etc.
I think the feeling is one of fear vs. emptiness or listlessness. Fear is a feeling of feeling attached to something and having it leave your grasp so you don't want to get too "involved." it could also be a fear of success, a fear of feeling you are capable of being a worthy champion.