You may find the following useful over the Christmas period.

Counselling in London or online
For one-to-one therapy for scapegoating, sibling abuse, bereavement, anxiety and depression
You may find the following useful over the Christmas period.
This post has a very honest experience of living with depression and how peoples advice, no matter how well meaning can be very unhelpful for the suffer.
Mental health issues are complex and the more they are understood by those around the one suffering the more it will help.
If you have ever felt suicidal yourself, been impacted by someone else’s suicidal ideation or just want to understand more about suicide then I recommend this podcast.
What is clear from the work they are doing is that suicide can be preventable if help is asked for. Obviously not everyone will have a health service that is following this model yet, but I hope the work they are doing is adopted by others.
Please contact the https://www.samaritans.org or your local healthcare services if you are immediate need of support.