My DH has developed a close and intense friendship with his work colleague. Their work situation sounds stressful, but he stays in touch with her frequently. At each work drama, he’s on call to her, or he tells me how she helped him, or he’s helped her. They text a lot, and I saw some texts, nothing remotely odd, but they seemed too intense. I saw a text from him to her at 6 am. Is this normal?