My condolences to you Jody. I had a best friend I met the way you describe...originally as part of a support plan, but she was so special she became closer to me than anyone, and vice versa. I understand too well why she had to go when she did, (I am not one of those who has ever improved), but I still miss her all the time. Please know that you gave Linda the best gift anyone could have: your time, energy and friendship.
With my deepest sympathy,