What's your thought on finding passion?

People always say, "Do something you love or feel enthusiastic about." I'm 20 years old and personally I don't feel anything like that. How does this "passion" work? How do you figure it out? Many people are working on what they love or feel genuine about. I feel envious towards them. For a while, I started feeling extreme depression, anxiety, and identity crisis. I don't know how to figure this out. I'm at a loss here and I feel extremely pathetic about this fact. Can anybody find their passion? Is it possible that I'm not capable of figuring this out?