I understand how you feel, even though I don't have another half, I did have an big arguement with my friend last night (she is like a sister) because she just wasn't being understanding. I just found the jokes about being a wimp and lazy all too much. But with her being female, she was able to understand that the tears were because of fustration. I just explained how I really really want to do things - but my body won't let me.
Sorry, I haven't got any good advice, but if you let him read some of the infomation on the main site it may help, and I am sure there will be people on here will similar problems that will be able to share their experience.
At work today, I took in the little booklet "Living with HMS" that I got when I applied to be a member (infomation on the main site). Quite a few people read this book and it prompted conversation, they were able to say - oh it affects all your body and is interlinked with other conditions. So that was good. One person said - I like that it is a young woman on the front, it shows it affects all ages and there is no obvious outward signs of the pain.
Benign Joint Familial Hypermobility Syndrome (BJFHS) - Confirmed Prof Bird April 2008
I am a Pharmacist and I will give my opinion on these boards. However, always ask your own health professionals for your individual circumstance.