Boyfriend (M38) is controlling/upset about my (M30) new lifestyle. Is he truly controlling or is he trying to "protect" me from something I can't see?

I (M30) have been with boyfriend (M38) for 5 years, we changed and grew a lot with time, especially me. Last year I was suffering of depression, had to take time off from work because everything was just becoming too much for me to handle even physically, during my time off I started to go to the gym and some months later to go out for runs - at the beginning it was something that inspired him (even if he doesn't want to admit it) to join the gym as well, but after a bit I started to sometimes sense some sort of insecurity/competitiveness from him (for example he would ask how long i was staying at the gym, how many days, etc cause he didn't want to fall behind).

Skip forward to one year later now, I lost a lot of weight (27 kgs to be precise), I love going to the gym, I love doing sports, it makes me super happy and I feel strong. It really helped me going through depression (together with a lot of therapy and SSRI), I love my new body and I feel more confident. I try to stay active everyday but for my boyfriend this is becoming a problem, especially since I joined a 6 weeks fitness challenge (calorie tracking and deficit + gym sessions + 11k steps a day) and started going 4 times a week to the gym instead of 3 - he says that I can't see that it became an obsession, that it is ruining our relationship and our time together (I always go to the gym in the morning while he's still sleeping), and that if he knew 4 years ago that I was going to become a "gym bro" things would have been different (literal quote).

Now, the 6 weeks challenge is over, and it was always a limited time of time in which I was pushing my limits, never planned to do it forever since the beginning, but it was such a hard time for me because he was so much against it. Talking me down a lot, hating my coach, and belittling me.

I'm so lost, because I love him, he's my family, and I know that he's worried this could develop into a worrying fitness obsession. But I'm so proud of everything I achieved, and I feel like I always have to explain myself and my decisions, even though he will never listen to my reasons. Am I blinded by my wellbeing and I can't see where this is going, or does he have little to none trust in my choices?