My best friends girlfriend split up with him 4 years ago, they lived with each other for three years. She has been dating another man for the past 4 years, but my friend can't stop thinking about her and constantly talks about how good life was when they were together. They both still keep in touch through emails or texts and sometimes phone calls, but I feel this woman is just stringing my friend along. He compares every woman he meets to her; he says he wants to find a really beautiful woman so he can show her off to his ex girlfriend. He gets so depressed if she does something to make him think he's not going to get her back and his life is just standing still living in the past thinking about this woman and how things used to be. I am very concerned for his mental health and I would really like him to move on and be happy again. What can I do or say that will help him let go of his past relationship and move on? I feel it has become an obsession.
