How can family members support someone who is refusing to see a doctor about potential dementia symptoms?

Can I join the military with spinal fusion, let alone as a fighter pilot? I still have a good range of motion and continue to do combat sports, MMA, and airsoft milsims with heavy gear.
Why do some people claim to look younger after meeting their twin flame? Could there be psychological or emotional factors at play?
What are some practical strategies for managing the intense feelings of doom when you're an autistic person facing a stressful situation?