My mom said I cant date until Im 30 Im a teen and I know she's being protective and all but she let my bother date his girlfriend when he was like 14-15.?

It sounds like your mom's rules are influenced by her perspective on dating and may differ based on her experiences with you and your brother. It might be helpful to have an open conversation with her about her concerns and express how you feel about the situation. Sharing your thoughts could help her understand your perspective and potentially lead to a compromise. Communication is key in navigating these kinds of family dynamics.