Grow away from
Definition 1 of 3
Pro Tip 1/3Emotional Distance
Indicates an emotional or relational separation, not physical distance. 
She didn't plan to grow away from her childhood friends.
Pro Tip 2/3Gradual Change
The process is usually slow and might not be intentional. 
Over the years, they grew away from their traditions.
Pro Tip 3/3Not Just Negative
The change can be positive, neutral, or negative, depending on context. 
As he grew away from his fears, he found courage.