Sounds like you're already doing it. You're staying with him despite the challenges. Just stay solid, and take care of yourself. It might be a rollercoaster for a while as he tries different meds and therapies.

(As someone who is just starting... and someone who's not really all that aggressive or confrontational? I was ready to b***h at the mental health guy I was talking to yesterday when it was my first session with him. I then spent the rest of the day fighting tears and when I was alone I broke down multiple times. I don't know how everyone else has been, but clearly it's a rough start for me).