Is this just me making everything about myself?

I’m pretty sure this is me being stupid but I’m always open to hearing others opinions.

I usually go to the gym pretty regularly and so does my bf. My bf is more into the gym than me, and because of my schedule the past few months I’ve been slacking and only going like 3 times a week and my diet is a bit off.

Regardless rn my bf is also coming out of a slump. He hasn’t been very consistent for the past 6 months, but is getting back into it and getting back into his body building routine. (I only met him a few months ago so I never saw him at his strongest/biggest/leanest, just seen pics)

Anyway since he’s currently getting back into it and trying to reach where he was before, he says stuff about how he’s small and fat. Which I genuinely don’t think he is. He’s very strong and sure he’s not shredded but he’s definitely not “fat”.

When he says these things it makes me feel bad. I feel like I am fat and small. By small we both me not muscular enough.

But I feel like there more fat around my waist and my legs have gotten less muscular.

So whenever he complains about how he’s fat, obviously I reassure him and I don’t say anything about myself. But I have a hard time hiding that it makes me feel bad.

Am I just making everything about myself in a bad way?

I know bodies change, I know I shouldn’t be so critical etc. And I know I’m not actually fat but I have more fat around my waist than I would like currently. Body dysmorphia really hits us both I guess. I literally see his body and I think - damn I really gotta get back to work because his body is a lot nicer than mine and I need to keep up. And it’s funny bc sometimes he sees me and says the same thing to me about himself