A friend of mine used to run a help site for depression, he always said people who suffered from depression often became incredible actors in the way they managed to hide the fact even from the people closest to them (you often hear people say after a suicide “I’d never have thought they were the type” to coin a phrase).
Interestingly, he managed to conquer or at least control his depression and went on to become the worlds strongest power lifter for his weight a few years ago, but the important part was, he received the right advice and help and at the right time, because his wife was a GP and knew exactly what help he should be getting, he always recognised just how fortunate he was in that respect, hence why he began the help site in the first place, for those who weren’t .