Kate Middleton’s brother, James Middleton, is opening up about how the Princess of Wales’ mental health advocacy work helped him on his own wellness journey. “When I first publicly spoke about my depression, they were launching their Heads Together charity and that was great for me to learn and understand and have a platform,” James told an outlet. “But it made me feel confident enough and supportive enough in what they were speaking about in what I felt.” “As I’ve said, I didn’t believe I was allowed to have mental health or depression and that work was a good catalyst for me to want to speak…