The receptionist at my dentist's office (who happens to be his wife) told me yesterday that she also had 4 teeth extracted and braces as an adult, and you could never, ever tell by looking at her smile (which is BEAUTIFUL, by the way). I told her that I couldn't see how my ortho could extract just one tooth from my left side, and still line everything up properly. She just smiled that beautiful smile of hers and told me "Just trust the process, Cathy... it's amazing what these guys can do!"
My opinion is that because I've seen people with extractions end up with beautiful smiles, you should just do it and get it over with. There was someone else here on the boards who agonized over the decision, and once she decided to do it, does not regret it one bit. (Sorry, I can't remember the name offhand.)
Good luck in whatever you decide to do. You're a beautiful girl to begin with, so I don't know what they could do to make you less beautiful.
-Cathy