I think you need advice on how to handle your personal relationship with your parents more than you need financial advice. You already know the financial answer is to stop doing this to yourself. Move out and if you want to see them invite them to your place or out to dinner so they can’t take advantage of you. A family plan, $100 seems steep if there are multiple people on there. Only pay if you are given a bill and then pay your share. If they won’t do that look into getting a family plan with your boyfriend. And please post in a sub where they are allowed to give personal advice you so can finally stand up to your parents and put some healthy boundaries in place.