I have worked with teens for 18 years and there has been a real change with regards to friendships and social understanding. Friendships seem to be a lot less stable, teens are behaving like primary children with lots of; "she looked at me funny", "he is my friend but hanging out with x,y,z" followed by fall outs and tantrums. Schools have responded with an increase in pastoral care, but it's often not enough. We have lonely children without decent friendships in every classroom in the country, and it's a travesty. For your son, I'd say to look forward to the future because he will find his tribe, and schools can be incredibly toxic. College, apprenticeship and work is where he will thrive. Focus on the positivity of the future for him