Why does my mom act like she's in high school? How do I get her to stop? It's so annoying?

nearly everyone has probs with at least one parent. take a phsyc 101 class and figure it out and find a diplomatic and respectful way to address your concerns.OR get a job and move out and be your own person in your own house ion your own. sounds like she does have some issues maybe you can help her get through them. TRY