Apartnering Up

My husband and I started having problems when I found an email he sent to his ex-girlfriend saying, "You're the most beautiful woman I've ever met. I want to spend the rest of my life with you." He's never complimented me during our five years together. He revealed that he and his ex used to have sex for hours, while the most we ever spent making love was 45 minutes -- only once, when we were first dating. I think I should leave, but we have a 1-year-old child. We are good together caring for...