Very erratic behavior.
Defensiveness, anger outbursts, making excuses not to be home when once a homebody, and so on. Late hours became later, attitude changed, he was not where he was supposed to be at work and so on.
The phone became an addiction, as well.
A person is a person, no matter how small. -Dr. Suess
Perserverance and spirit have done wonders in all ages.