There are two ways to solve this problem:
First, your boyfriend likes fitness, which is a healthy and active lifestyle. It's good for him and good for you. In order to be healthy and improve the quality of love, will you consider joining the ranks of bodybuilders and working out with your boyfriend? You can warm up by running together, he goes to the equipment area, you go to the yoga area, and finally do spinning, take a shower and drive home together. How wonderful is this life?
Second, frankly, peacefully and seriously put forward your dissatisfaction and demands to your boyfriend. Never sulk alone, and then lose your temper and give him an unreasonable feeling. I believe he will understand you because he loves you.