You know you can't help him, Nicola--you've told me this about my own situation. You can choose to keep treating him with love, though, and that in itself will help him.
COG's post is wonderful, as is the other advice. The only thing I wanted to add right now is in reference to positive thinking. I don't think Dyer would say that it matters if you picture yourself with H or alone. What is important is that you focus on being in flow with God/ the universe/ whatever you want to call it. Choose to be happy and happiness will come to you.
I wish that I felt that deep happiness that you feel. Many times I feel content, but truly happy? Not yet.
