Sorry to hear that. Just remember, only being a twin changes nothing. You are a single person and responsible for your own luck.
Dont like the city you live in? Just move (many companies own stores in different locations, maybe you can even keep your job).-
Dont like your job? Change it-
Life is too short to be unhappy or to feel like a waste.
Be happy and concentrate on yourself.
And try not to see yourself as a twin but more as an individual who deserves the best.