Son with anxiety and health concerns

I’m struggling at the moment as my youngest son hasn’t addressed his mental health issues and is morbidly obese . I am a nurse so feel a huge guilt about it. His Dad has not been supportive of him getting mental

health help over the the years. We are divorced. He is now 24 with high bloood pressure and sleep apnoea. He saw a psychologist last year but didn’t go back after 3rd appointment as said it made him feel worse. He has anxiety and depression