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.
You gave me nothing and now it's all I've got - Bono
A person is a person, no matter how small. -Dr. Suess
Perserverance and spirit have done wonders in all ages.