Should I give up dance?

It sounds like you're really unhappy at the studio where you're currently teaching and you're feeling really unappreciated. You might feel badly about leaving a studio where you have put in so much time and energy, but if you're so unhappy, maybe you deserve a change. This new opportunity sounds promising. It sounds like you love dance and love teaching. Moving to a new studio can seem a little scary ( I did it when I was a dance teacher), but wouldn't that be better than giving up teaching altogether? You might owe it to yourself to give it a chance and continue teaching and ping on your love of dance.