I hate to go to parties&dance but my parents argue&say i should. how to prevent the argue without doing what they need knowing that my mom is diabetic?

Parents: perhaps you should redirect your extracurricular activities. If you you could find if there's any common ground between you and your parents as to what other activities you both might find beneficial. That way you could eliminate parties and dancing in exchange for some other means of socialization and meeting other people your own age. That should make your parents happy also.