DD told me a few months ago that she has self harmed. Thankfully she wasn't seriously hurt and with her permission we went straight to the doctors who referred her to CAMHS. We have an initial appointment in April which I think is to determine what service we get referred to next. She said she felt we were paying more attention to her sisters so we made some changes to get her out of her room at weekends, including removing all social media and all seemed much better. It's really frustrating as we try and include her but she just wants to moap about in her room.
I told her school who tbh haven't offered any help. They just said they would ask the teachers not to let her out alone during lesson time but there was no offer of counselling etc. Maybe I expected too much.
It all seemed to have calmed down until last week. I had asked her not to tell her friends as I didn't think they would be sympathetic. Dd is in year 8 and had a wobbly start to year 7 with friends so this group of friends is quite new. Unfortunately, dd had told one of her friends who in turn told her mum. The mum then sent dd messages via her DD's phone saying she felt they shouldn't hang out with each other anymore and the friend cut dd out of the group by refusing to speak to her. The girls all chose the other girl so dd is now sitting alone at break and lunch time which is making things much worse. The mum also reported the self harming to the head of year but she knew already from me. It hasn't made any difference to the lack of support dd gets at school.
I found a diary in DD's room last night which was full of feelings of self hate and saying she had no friends etc. She is constantly saying people don't like her, she doesn't 'get' people and she finds noise in the school overwhelming. She thinks she's depressed. The last date in the diary is just over a week ago and she says shes self harmed. I haven't seen any marks on her and when I ask her she says she hasn't.
I just don't know what to do. I have no one to talk too. I spoke to my mum who suggested it was my fault for giving her too much.
my DH is fairly dismissive of it as teen angst, but after seeing this diary I'm worried. Even more so now she's alone so much. The trouble seems to be dd though, as the friend is talking to dd as I've read messages on her phone, but DD is adament she'll be polite to her but doesn't want to hang out as she can't trust her. There is more to it with this girl as this is the 4th time dd has been ignored by this girl without any obvious reason. I've tried to tell dd that sometimes it's worth putting things behind you as otherwise she's cutting her nose off to spite her face so to speak. She's making the choice to isolate herself and the feels miserable. I just don't understand it. She has a lovely life, we do out best and she doesn't have any problems but she still feels this way.
DD has always has had difficulties with friendships since year 5. She pretty much had no friends in year 6 and then in year 7 made friends with a very troubled girl. They were pretty exclusive despite us telling her to mix and dd was devastated when the girl left. That meant she started again in year 8 in terms of friends. I thought she was doing really well with this group with the exception of this one girl who intermittently cuts dd out of the group by ignoring her. I have told dd to calm down a bit as he's very intense. She seems to want a best friend who will be as loyal as she is and just doesn't seem to understand friendships and cannot understand why this girl betrayed her trust by telling her mum. She says people like her when they first meet her but then they go off her and she doesn't know why. The school is set up in a way that despite having 7 groups in each year, they have most of their lessons with the same group. I asked the school if she could change groups as she finds her class very noisy and I thought maybe she needs to mix, but they said no. I know the last time she was isolated from her group that she tried to join other groups of girls but they wouldn't let her. 
Do you think a change of school would help? She is at a girls school which she doesn't like. But she also had similar problems in her mixed primary school. I'm just not sure changing school will make much difference as it doesn't deal with the underlying cause.
Sorry, that is long!