dh gained 50 lbs in 3 yrs, im struggling with how it lands at clubs and i feel awful saying it

this is hard to type. im 38, dh is 42, weve been in the lifestyle 6 yrs and have a solid little circle. dh has gained about 50 lbs over the last 3 yrs, stress + sedentary job + general life. i love him exactly as he is at home. when we go out though i notice him being approached less than he used to be, and i notice myself getting attention while he sits with a drink, and there's this awful little voice in me that goes "if he just lost some" and i HATE that voice. i havent said it out loud to him. but i also dont know how to keep going to events watching it happen. how do other wives handle when their husband's body changes and the dynamic in the room shifts. do u talk to him about it... do u just keep going and hope it sorts itself... is there a way to bring it up without crushing him