I think Harry's biggest problem is that he doesn't have the intellectual capacity to be objective. Difficult, obviously, when you are emotionally invested. But at some point, I think we all realise, in our turmoil, there comes a time when you have to stand back and take stock - and possibly see yourself as others see you.
At the moment, he's too self-absorbed, and if he continues like this, it won't serve him well.
I've no expertise nor qualifications in psychology or mental health, this is purely a 'gut' feeling. The feeling that he should now explore his inner-self and his 'issues' in private, and absorb any advice he's being given without sharing it with the rest of the world,