When the Lord God Almighty determined that love would be the defining characteristic of every relationship, he never imagined that the process would become as complicated as it has. Whether you are best friends in high school, parent and child, or husband and wife, love must define the relationship.
One key barometer of whether or not we love someone is whether we are interested in seeing them on a regular basis. Some of us assume that love cannot survive unless we are constantly in each other's company, while others prefer to converse through the ether, or in emails. Still others believe that no communication is necessary when genuine love exists, and that we easily can pick up the relationship where we left it ten or twenty years ago.
All of these beliefs can be valid if both parties to the relationship agree. However, if one or more parties to the relationship needs physical proximity, nothing we say will convince them otherwise. In that case, we need to include periodic physical proximity in order to keep the relationship alive and growing.