I just found out that my sons' girlfriend has been cheating on him.
Both she and my son are 18 and have been together for just over 3 years.I received an e-mail from someone who has sent me evidence that she has been cheating on him for the past year and a half. I have NO idea how to handle this. I know I need to talk to my son but the pain its going to cause him is killing me. I am looking for the best words,phrases, or whatever to begin letting him know. I would really appreciate your guys' help.