Hi there - the RSDA has a very good packet of information for family and friends of people with RSD. I highly recommend it.
Also - there is some research you could cite for him that shows that family support actually reduces the level of pain you feel! (and the opposite is true, too - lack of support makes your pain and depression worse, but you are already feeling the effects of that ...)

Pain, negative mood, and perceived support in chronic pain patients: A daily diary study of people with reflex sympathetic dystrophy syndrome. Journal of Consulting and Clinical Psychology 67:5, 776-785 (1999) "Perceived support had both main and buffering (interaction) effects on negative mood and a main effect on pain."