Hiya I just wanted to say:
If you are 11-18 years old living in England I really recommend signing up with Kooth. It’s a website so it’s completely free but it’s helped me a lot in that it’s given me somewhere to vent since I have no one else to talk to. I’ve been given a named worker there as well (basically my own private counsellor, again for free) who I send a message to every week, which he replies to on a certain day. This isn’t automatically given to you but it’s still an option. There’s also forums and you can have a live 1 on 1 chat with a counsellor. Or you can just send a message to a counsellor and they’ll reply. I found this helpful since talking live makes me feel very anxious. 
The counsellors are super nice and non judgemental and you can literally talk about anything. The forums are also nice to see people struggling with similar things as you. And of course it’s all completely anonymous. 

Anyway I just wanted to share my experience and give a recommendation. I hope that maybe someone will benefit from this!