PLenty of heavier men don't mind heavy women. There are heavy men sitting at home right now thinking that no woman wants him. If you can't lose the weight then realize that you may have to be with a man that is heavy too. Or older. Or younger. You may not find the ideal mate, but life isn't always ideal. just feel good, be healthy, and count your blessings. Often physical things are actually the result of spiritual lessons that we have to experience. The more you cry and throw a tantrum about life the more life wants to teach you to respect the good around you.
I do disagree with the last post however. Strictly speaking, in our culture a man who is 250 pounds can be extremely desirable to most women. Especially if he is a football player or "buff". Women often like big strong men, whether they are a little chubby rather than muscley is a detail that matters but isn't critical. In the south larger men are definitely in vogue to a degree because people here are overweight more often.
However, large women of 250 pounds or even 180 pounds are not considered desireable by most men. Men want women of 160 or less generally.
But don't be jealous of us thin guys. I have the opposite problem, I am quite thin and cannot gain weight and it annoys me as much as losing weight annoys others. And it doesn't help that most americans despise people who are too thin even if the thinness is excessive and unwanted. They hate us because they want some of that thinness. But women often don't like very thin guys. They want guys who are trim or muscular. So it can be hard for us too sometimes. In the south it is harder for thin people. Other areas of the country have different ideas about ideal weight.