Passion?

I really found something that I absolutely love to do. I'd be the happiest person on Earth if I can do this for a life time, or maybe a living. How far am I willing to go to make this happen, though? I think when I am truly willing to do anything for this, I can call it my passion. Perhaps, the reason why I can't confidently say that this is my passion is because it seems so far away from me; it seems unreachable. But... that's how everything has been working in my life; I managed to reach certain places I never thought I would. So, there's hope. When will I start believing in myself?