Yes I think you should confront him and forgive him. The power behind that is immense. It maybe something that has haunted him for a long time and knowing that you don't hold anything against him could be freeing for him. Just remember to pray about it and ask for the courage of the holy spirit.
Just a note, forgiveness and reconciliation don't have to go hand in hand. Forgiveness just has to come from one party, but reconciliation has to come from all parties and the willingness to accept forgiveness and offer an apology back.