How to deal with a great best friend?

It is normal to be jealous & your feelings are justified. If you work hard for something you should be rewarded for it. Sometimes things come more easily for others. That's just the way things are but it never hurts to strive for better. Being jealous of your friend won't hurt anyone so long as you can separate those feelings to matters of competition ie, school, sport, education. You can still be great friends you never know she may even be jealous of you too.