Hello Island! You are not alone!! I currently have frozen shoulder. I have had it for a year now. Don't despair. For the first 3 months, the pain was nearly unbearable. I barely slept, I felt depressed, like you I withdrew because no one could relate (one guy even swung his arm around saying that he couldn't imagine that I can't move mine-- I told him he WASN'T helping me by doing that in my face, and he apologized). Then, I had these spasms that would occur from nowhere-- as if the pain couldn't get any worse, the spasms raised the bar times 10!
There was so much that I couldn't do, or I could barely do. Stuff that we really do take for granted like driving or reaching into a cabinet, or pulling your hair into a ponytail. I saw an orthopedic who wanted to give me some shots. I said no. I then got referred to a physical therapist. After 3 visits, I stopped going. The pain at night made it impossible to sleep. I found a trick on the web that to sleep pain-free, you need to prop a pillow underneath your hurting arm. The pillow will give you support during the night. The first time I tried it, I was finally able to sleep well. I had to use the pillow at night for about a month.
After the 3 months, the pain subsided, but I still couldn't use my arm very much. As I type this right now, my shoulder is a little sore. What I determined to do was to exercise on my own. I began going for walks and doing some daily stretches. I didn't exercise much before my shoulder became frozen. I now wanted to become very healthy. I started eating better, too. Although it's been a year and I still have the condition, I am happy to say that my range of motion has greatly improved. I can drive, reach for a few things on a shelf, I can even do a ponytail now, and I have fewer problems getting dressed! I say all of this to encourage you. Do what you can to stretch and eat healthy. Don't overdo things, but do enough so that you can slowly rebuild the use of your arm. It will take time, but being patient and positive can go a long way. Don't lift anything heavy. Just light stretches. Walking is good exercise. (I'm typing and I can feel my arm getting stiff, so I stopped and did some stretching.) Mobility is the key. After you recover, keep up with stretching and exercising and eating well so that the condition won't return. (I read that once you get it, it can return in the future.)
Hang in there! It WILL get better!