Here's some motivation.... I weigh 270lbs and I need to lose 50lbs to get to my "ideal" weight....
I wouldn't be to concerned about your weight. If you feel like you need to lose a few more pounds then more power to you. Remember, since your a dancer, muscle does weigh more than fat. If you have bearly any body fat and you keep trying to lose weight, your just going to be losing muscle mass.
Good luck