It's so upsetting seeing a child distressed I know. Sadly in this religion the members are very oppressed by the GB and the elders that they judge and oppress one another in turn. You have one child out and your daughter is reaching out to her school friends which is good.
She is finding her way, but I know how heartbreaking it is to see a daughter upset. Yes the JWs will judge and exclude her if she makes friends at school but that will help her see what the religion is really like. I feel for you, hang in there.