That's the wrong path to be going down. It's cheesy, but believe me, you would much rather like to have a guy who loves they way you are right now. Any jerk that is gonna date a girl because she lose a few lbs doesn't even deserve a second look. Not to mention people have their preferences, would you go out and get a nosejob, boobjob, gain forty lbs in order to get a guy to like you? Doubt it. Looks are important but they aren't everything, the relations based on them are generally pretty pethetic and shallow.