I have been dealing with crps for four years. I too was left in the dust as far as friends go. My crps affects my right hip and leg which affects my ability to do alot of things. I just cant keep up with them anymore. My family included. We had to really come to terms with this because i cant mother them the same as before. Some days i cook, some days i dont. The house isnt as clean either. I dont go dancing, hiking, or take road trips. I am not the old me. I've had to find new hobbies which led to new friends and slowly i am rebuilding my life based on my abilities. Good friends hold on thru the turmoil and metamorphasis, others just dont. Try arranging something with your friends that you can manage. If not a home cooked fancy meal, maybe pizza or a drink after work.