Sorry you're going through this. I don't think you should listen to the advice to just "drop" your fiancee because he's not an animal lover. My husband isn't crazy about my dog either. Winnie has chewed through a few power cords and a few baseboards and my husband hit the roof. You really can't trust your dog even at a year old to be left unattended. Winnie is just now three and we're just starting to give him the freedom to be downstairs by himself without suppervision. I don't think it's unusual for a one year old dog to still be getting into trouble when they're left unattended. Take your fiancee out to a nice restaurant away from the craziness of life, work and your little one and talk it over. Try to take the focus away from the dog by telling him it's really not the dogs fault but yours for leaving him unattended. We all FREAK out now and again and say things we don't really mean. Give it some time and promise your fiancee that you'll be more careful with your furbaby. Even thought my hubby says he doesn't like Winnie who do you think is the first one he "hugs" when he gets back from business trips!
Things will get better...you just have to prove to your fiancee that you can stop these things from happening by keeping your furbaby gated or supervise him a little better. *HUGS* to you and keeping my finger crossed. Take Care