I think you are doing all the right things.
Having been in a similar situation, I wish I had been as proactive as you.
People have different coping strategies and tactics. If something is helping someone I am all for it, whether it is unconventional or conventional.
A book that helped me a lot was "Positive Solitude" by Dr. Rae Andre. I found it very helpful when I felt alone in a relationship and also when I was all alone. There may be better books out there, but this one helped me personally.
I am going through a rough time right now and I was inspired by your post and your determination.
Wish I knew what to say to help you but sadly I am at a loss. Hopefully others here will have better words for you than my poor words.
My heart goes out to you and I hope you will be able to have peace of mind and joy of living again. By the way, I was hesitant to go to the movies by myself but pushed myself and found that I really enjoyed it. All good things to you!