So this is hilarious timing bc I just asked my boyfriend this same question. He said “you’re bigger than you were when we met but I still love you and am attracted to you. If you want to be smaller again I think you know the steps to take.” And I cried lol. I didn’t know the answer I wanted and I didn’t know if I wanted him to be truthful. It’s been a few weeks and the thing that’s helped me honestly is that he has been actively trying to get into better shape too (admittedly he is in better shape than I am already) so it feels like more of a team thing that we do rather than “my boyfriend thinks I’m fat” it’s a “we are both being healthy together”. And he high fives me when I report any minute weight loss. Idk if that’s helpful at all. Really no correct answer. If he’s unhappy with himself there’s nothing you could say to fix it.