You are very pretty. I notice in your picture you aren't smiling. Smiling is very attractive. For me it makes a woman soooo much more beautiful. Posture also makes someone more attractive. Smile and stand up straight and you have nothing to worry about.
in life, people will tell pretty girls that they're ugly b/c they wanna play mind games. whenever someone says you're ugly just know that they are jealous. they don't want you to think you're pretty b/c they feel threatened by you (as they should!)