He cheats but can’t get hard for me

My husband has medical issues high blood pressure diabetes which I thought gave him low sex drive and trouble getting hard. He has to take pills to be with me. He never really shows he wants me he’s always just kept up with a quota kind of. Like he makes sure to have sex with me at least once or twice a week because I want it. And then I find out he is still cheating.

Am I that repulsive? Like wtf is wrong with me

Edit. We’ve only been married a few years so I couldn’t have changed that much. I am in my 30s so things don’t look as great as they once did like my breasts have kinda shrank and are a little saggier. I’m still close to the weight when we met just a little less. Covid has me not really dressing up or anything right now but I still occasionally do and put on lingerie and everything so I still try. I just can’t figure out where I went wrong. I know it’s his flaw but how do you cheat but never really interested in your own wife