What happens is you stop desperately seeking acceptance from others and start acting naturally which would dramatically help you to improve your social skills and deal with rejections. Sounds good enough to me.
Acting naturally doesn't mean you will automatically become a social person or more extroverted. It doesn't mean either that you will accept rejection more easily. If you accept yourself completely you may also have to accept that your personality doesn't blend well with society and accept the loneliness that comes with it. I doubt a lot of people are mentally strong enough to accept the fact that they will never experience love and die alone.