I think its wonderful that you found such a respite place in your theater experience. And like others have said, one audition that doesn't result in a part should not end your quest, your drive, your desire to experience this again. It wasn't your lack of talent, you just weren't the directors perfect choice for the part. There will be others - don't give up. In the meantime - there are ways to express your talents - google singing or acting clubs in your area. How 'bout this?
When something I really want is snatched away from me I try to think of the person who got what I was after - Maybe that person was in a place where he/she REALLY needed that particular thing at that exact moment. Maybe something they were going through was far worse than what I was going through and having that "thing" would make a huge impact in their life. I also like to think --- well, if this wasn't the best option for me, then there is surely something better waiting.
It could be that had you gotten this role - you would have been forced to give up something that would have caused deep hurt to you or someone close to you in the coming months.
There is always a different way to look at things to help re-focus and re-group.