Sjogren's Syndrome Support Group
Sjogren's syndrome is an autoimmune disorder in which immune cells attack and destroy the exocrine glands that produce tears and saliva. It also associated with rheumatic disorders such as rheumatoid arthritis, and it is rheumatoid factor positive in 90 percent of cases.

Dealing with a lot of this myself. You want to say to your friends, If I had both my legs cut off, would you understand I can't just up and leave? Because that would actually be easier!!
I don't have any answers for you other than, it truly sucks.
I'm sorry that your friends don't understand. I wish there was some way to make them understand...but, there just isn't.
When I got sick...really sick...I had 1 friend out of what I thought was about 25 friends who truly understood. You know why? She had an autoimmune disease too.
What you need now isn't understanding - it's support.
I found it in very few people. But, where ever you find it...latch on to it and treasure it.
I wish you luck.
Remember, boys grow up and help their Mamas. My son is my $ support, with help from husband and brother. It is costly to be ill and I am very sorry you cannot work anymore. Dependency is hard to take. It's not our fault. I think I'd be terrible, if my husband was the sick one. Better, this way.