You are very young. And regarldess of whether or not you are trans, you REALLY shouldn't be putting up pictures of yourself in nothing but a bra. If you believe you are beautiful, then that is all that matters. You don't have to ask random people if you're beautiful. If you can see that you are beautiful both inside and out, at the end of the day, the person you end up with should see the same thing. Good luck with your transition