This is more of a WWYD than AIBU.
I am getting the feeling that dc1 is depressed. He never smiles anymore, spends all his time in his bedroom, doesnt interact with us much anymore. Very few friends. Looks like he cant stand his dbro (But I am struggling to see why nowdays - what dc1 is coming up just doesnt goes with dc2 behaviour iyswim). dc1 is still physically active and involved in his sport but even that is often meet with little enthusiasm (even thugh he is still very keen to go). Most of his time otherwise is spent in front of a screen.
I want to talk to him and tell him I am getting worried about him. And try and find out what is going on, what sort of help he might need etc... I have tried in the past asking him if he needs anything, if he can do anything for him and it all went flop.
Would you go a bit more heavy handed to understand what is going on?
dc1 is 16yo and doing his GCSE atm if that makes any change.