Talon, I'm so sorry.

Have you asked your boss why you were passed over? If not, I think you should. Tell him you want an honest answer so that you can improve the areas he's concerned about....that you are very interested in advancing your career and wondering what it is you're "missing". Even if you don't apply those answers to your current job, it may give you a hint as to what employers look for in that particular position.

Is it a management or supervisory position? Perhaps he simply thinks you're not aggressive or "tough" enough....something like that. I know you've said in the past that you don't wear makeup....maybe you need to concentrate on "polishing" your appearance. I'm an executive secretary, so I have to pay very careful attention to those details or I'd never be able to hold the position I do. Perhaps its time to buy some new clothes that fit nicely! Could the issue be something like that? I doubt it's only your weight!! You're a skinny-minny now!!