I have a year 8 girl who is very fragile and needs a lot of support. She has taken a liking to me. She doesn't trust many adults, so it is a mini break through. She trusts me. The problem is, she made a request to add me on facebook, and I know I shouldn't add her. I don't want to add her. But how do I politely refuse, because I think she would take it really badly. She has such a low opinion of herself. I was thinking of explaining to her that until she is no longer a pupil of mine (I am planning on leaving the school at the end of the year) I can't add her as it isn't allowed. I did already try and explain that to her before she actually added me, but she didn't seem to understand, saying that no one would know. I am not going to accept her request. But I just want some advice on speaking to her about this without making her feel rejected.