DEAR ABBY: I’m a 39-year-old gay male who was in a relationship with a very attractive 44-year-old teacher. He never wanted to commit to a monogamous relationship. After 10 months of seeing each other, he informed me that he is about to enter into a relationship with a 22-year-old. He said it was nothing I did, but he is just attracted to younger guys when it comes to relationships. He also inform…