Cameron Diaz and husband Benji Madden have found a healthy way to work through any issues that arise in their marriage. Though the pair has kept their relationship private since they first got together, an insider revealed they do talk about their hardships with a couples therapist. “Cameron left Hollywood to focus on her mental health and she’s been a big believer in therapy for years,” the source told a magazine. “She’s told her friends they go together, and that it keeps the communication flowing smoothly and solves problems before they become serious.” According to the insider, the actress…