It depends on precisely how he's attempting it. Franklly I'd sit down and have a heart to heart with him about his behavior reassuring him that even at a lower, AND more attractive to other males, weight I'd still be his. Further wouldn't he be happy to have such a beautiful me on his arm

Then since it's proably a little deep seated when he did something I'd remind him of our talk and this behavior. If he kept up his sabotaging ways I'd begin fighting back.
Jo