Mom trouble. PLEASE HELP!!!!!!?

OK! so im 13 years. my mom and step dad have recently divorced and now im mom has started dating again. a couple of days ago my mom went out with this guy and he was drunk so i told her not to go with him and stay home, but she didnt listen to me. i started crying cuz i thought something horrible might have had happen to her. later she called me and told me that they almost crashed so then i started crying some more and told her to please come home. i told her to come in a taxi and i'll even pay for it. so then she came home very angry at me cuz she thought i was being greedy and lier and told me to stay out of her life. but the truth was that i was worried about her and feared the worst. what should i do?! stay out of her life for good ? please help!!!