Maintain your body the way you like it. If you like to be overweight, love yourself and are not bothered about your weight, don't reduce it only to get a good partner. You will go back to old ways after some days and then what? Better keep your body image as you love it. If you are short in height, no amount of worrying will increase your height. If you don't look like a celebrity, no amount of plastic surgery can make you one. Are you in this world only to worry about the smallest fault in your body so that you can please someone to go into a long term relationship? That will also be cheating the other person. Let them love you for what you are.