First of all, you should take action to make yourself love sports and eat properly, and then tell him that sports are your hobby, so that two people can have a common topic, and then you can enhance your feelings. Go shopping with him. If you find the clothes he likes, and you like them, you are just a little picky, so that he can feel them and then beat about the bush. Pinch his fat once in a while and tell him you're going to lose weight. Remind him to eat more fruits, exercise more, eat less greasy food and rest early, which can show your concern and help him lose weight.