There's a great recovery writer called Patrick Carnes who states that "All addictions have at their root a failure in Intimacy", or words to that effect.
Some mileage in that I believe. Lots of folks with eating disorders, alcoholism and "love addiction" if you will have difficulty with genuine intimacy. Knowing others, being known, maintaining healthy friendships and relationships. ..
One of the tasks of a break up is to deal with the feelings underneath. Identify problematic patterns of behaviour, acknowledge feelings and fears etc without running into a new distraction or a chemical numbing.
So...it's good to deal with breakups by sitting with it and growing. In my experience and opinion. Sometimes that process takes a loooong time. Which is a real bummer
P