When people achieve something great it is amazing how much others talk negatively about them rather than positively. I was once overweight and out of shape, when I first began to transform my body I received much more resistance than I ever imagined.
Be proud of your achievements, not everyone will like what they see, nor will they be comfortable with your success. There is a good chance that people will talk about you behind your back.
Change you for you, the most important thing is that you are happy with yourself.