What do you do when you really like your friend...but your parents really don't? It's a tricky situation—on one hand, your parents want the best for you, and they're only trying to look out for you. On the other hand, they don't know your friend as well as you do.
Maybe your parents have pointed out that your friend didn't thank them when they took you both out to eat, or that her grades aren't the best. Those things may be true, but they don’t necessarily mean she's a bad person. Nobody's perfect, after all. In that case, let your parents know that you're aware of her faults. Then, tell them about her strengths. Why do you like hanging out with her? Your parents want you to be happy, so if they see that your friend makes you happy, they're more likely to feel positively towards her and give her another chance.
Have your parents ever said they didn’t like one of your friends? What did you do?