@sue417 you are not alone.

My diagnosis started me on a path where my goal was to research my cancer and understand my treatment options.
Then it was next steps to plan … surgery, radiation, and endocrine treatment.
Like you, after 6 months, my treatment was complete (YAY!) I was fatigued/tired, and not really interested in socializing with people who haven’t had a similar experience.
I felt like I had climbed the mountain … so what’s next?
On the advice of a good friend, I gave myself time to rest my body and absorb & reflect on everything I had been through (I’m a planner, so this isn’t easy for me☺️
I had been tumbled through so much in a short time, I needed to take it all in and breathe - I know that sounds trite, but after taking a few meditation/breathing apps, my jaw, neck & shoulders relaxed.
Spent as much time in sunshine as I could, got a gentle full body massage.
It really helped me to just write down what I had gone through - felt good to just kind of dump it all out.

Give yourself grace, you will get back to you!