The Pros and Cons of having a workout partner

I promise I wont talk a lot about working out "here",but right now I'm struggling with working out with the sportsman. Due to the fact that we have different goals. And he is a guy and I'm a women. We just recently changed our workout routine. Every six weeks. We change. So that your body doesn't get used to the workout. Anyways my goal is to lift. To build muscles. To look.like I work work.out. the sportsman's goal. Cardio. Cardio. Cardio. Yes he needs to loose weight. I get that. But I already Run almost 3 miles a day. I don't need any.extra cardio. I know you probably think I'm being fucking petty. but I'm.not. the new routine has a lot of cardio. So the other night on my Way home, I called the sportsman . Asked nicely,if we could Tweek the workout just a bit. Of course he got defensive. For no reason. He got all pissy. Over the phone. For no. damn reason. I had an idea before hand that this is how it might go down. I love having someone to workout with. Someone to help me. But....... I think.there have to be goals. And those need to be somewhat similar. Right? I'm.just so frustrated right now.we are signed up for thing's.several 5k's and the warrior dash. Only 3 weeks till the first 5 k . Why cant we get on.the same page.ive even given him the option(threatened to find someone else) or to find another partner. But he swears he wants to stay with me.any suggestions? Anyone. Peace