Falling for him, falling out of the game

My boyfriend and I have known each other now for 10 months and have been dating for 5. I have roommates and he used to live on the base in my hometown but now he has his own apartment. Our sex life was good for a while, but now I feel like I’m never really in the mood and when we do, do that deed, it’s always the same positions, the same motions, the same noises and I don’t know how to spice things up🙈