Never put yourself down. Trying to have a positive view on yourself, even if you don't fully believe it, will help you in the long run. Smile, and be open and friendly to new people at your school, and if you're nervous, just think of how nice you'd feel if someone came up to you and made an effort to start a conversation! It's a nice feeling, and other people will definitely feel the same. Boys opinions on you, or anyone's for that matter, do not mean that much, trust me on that. If you're still worried about how you look, go shopping, buy clothes that you truly like and wear them, no matter what anyone else might think. That is a first step to being able to look in the mirror and be pleased with what you say. Don't try and change for new people... they don't know anything about you, so show them who you really are from the start and you will make good friends that like you for who YOU are, not what other people make you.Good luck with your new school, and keep smiling!