Your mom may be trying to protect you from some of the hurt and disappointment that she suffered when she was a teenager. She's well-intentioned, but she and your dad will cause you far more hurt by forbidding you to date until college. Please try to appeal to an adult who is a trusted family member or friend to talk to your parents. A school counselor or a member of the clergy could also advocate for you.
It would be great if you and your parents could see a counselor together so that all of you could voice your opinions, beliefs, and feeling about your dating. A skilled counselor will respect everyone's feelings and try to bring about a fair solution to this family dilemma. I don't expect you to simply obey your parents' wishes in this area without being frustrated and disappointed. Please try all my suggestions so that your parents will be able to make better judgments about your social development. Thanks for writing.