In need of advice please

My husband and I have been married since 2 weeks after I turned 19, needless to say we've been married FOREVER. Around 5 yrs ago I found out that I have R.A. its painful and in a few years (no treatment is working, tried everything) I'm going to be a mess. I've been asking for us to explore a kinkier side of our sex life and he really wants no part of it. He's extremely vanilla and I'm at a loss. He really won't even try anything 'new'. He won't even watch porn with me.

I don't know how to fix this because its really becoming an issue between us. I've talked with him about wanting to try so much before I'm in a wheelchair and won't be able to. I take care of all his wants and needs always. Why won't he just do this one thing? Most men I know would be extremely happy to be in his position.

Any thoughts?