My marriage

Well I have been married to the greatest guy for almost 10 years now. We only really dated for around 3mo when we decided we never wanted to be apart. He is active duty Army and I have stuck by him through all the deployments, schools, and trips away. I have given him 4 great kids, kept his house cleaned, cooked him dinner almost every night, and loved him unconditionaly. Lately though it seems as if things are starting to fall apart. He never really wants to spend any time with me and I feel like he is sort of treating me like a maid and a babysitter. He is the lkove of my life and I cant picture my life without him but, I dont think he feels the same for me anymore. I try to talk to him and he just blows me off. I dont know what to do...I love him.