Sex advice

I don’t think I’m sexually attracted to my husband anymore. Anytime I’m in the mood (which is super rare) I just don’t want to with him. Our sex life is boring to non-existent. Idk how to bring it up without making him feel bad about himself. He didn’t do anything wrong, I’m the one who’s gained lots of weight but for some reason I just don’t see him the way I used to.