I can relate to what you are experiencing. My daughter is 16 and recently her teacher called to inform me that she has reached out to them as she is experiencing issues. I was shocked as she looks happy and her normal self. This led me to uncover more of her writings about not being included in group chats, friends whom she thought were her friends are in fact, not that close at all. She has written she is lonely and depressed. Much like what your son is experiencing. She spends more time in her room, more so now with COVID and online learning.   We are a stable and supportive family but it seems that this does not fill the void of a firm and stable friendship group at school. My daughter joins lots of activities in and out of school and it seems this could be part of the problem. Her sister's advice is to stick to the same group of friends rather than be a 'floater' with no firm friends. For your son, perhaps enrol him in a sport that he likes?   If the place you reside has Headspace, give them a try. They offer counselling and some activities for teens during school holiday. Hope that would help. ... View more