Teen parenting expert Rosalind Wiseman answers your tough questions.

Q. My daughter Amy is a fifth-grader and is relatively new to her school. Her friend Devyn has known another girl, Jen, since kindergarten. Jen seems to be jealous of Amy’s blossoming friendship with Devyn.We’ve had Jen over and she’s polite at our house, but in group settings she ignores Amy, teases her and makes faces.

A. Amy’s problem is a “friend” who is conditionally nice—the condition being they have to be alone. When they’re in a group, Jen acts mean to make herself seem more confident and powerful. Amy probably thinks things will get better if she’s kind to Jen or ignores the problem. But neither will work; she’ll only look weak. Here are her real choices: She can stop being friends with Jen all together or only hang out when they’re by themselves. Or she can work up the courage to tell Jen how she feels by saying, “I don’t want a conditional friendship. I want someone I can depend on.” Ultimately it’s up to your daughter to decide how to proceed. And it’s okay if she starts out in one direction and changes her mind. The important thing is for her to know she deserves to have friends who treat her the same no matter who’s around.

Do you have a parenting dilemma for Rosalind? Send an email to askrosalind@familycircle.com.

Rosalind Wiseman helps families and schools with bullying prevention and media literacy. Her book “Queen Bees and Wannabes” inspired the hit movie “Mean Girls.” She writes the Ask Rosalind column for Family Circle.