Is the way you respond to yourself during your exercise. Your motivation
Your mindset
Self-talk

Your motivation is what i think is right

Being independent does not mean that you don't belong. It just means that you can do things on your own, don't need people to think your thoughts for you, people don't make decisions for you. To belong is to fit in, in the way you are using the term. Being independent does not make a person not fit in usually.