What is i told him i miss him and he said i miss you too?

This exchange might suggest that two people who have a close relationship and likely have some level of affection for one another. They are comfortable enough to express their feelings openly and reciprocate each other's sentiments. It could be a sign of a healthy and supportive relationship. However, without any further context, it is difficult to determine the exact nature of their relationship or the circumstances leading up to the exchange.