My friend wants me to skip school with her, but I don't want to?

I say tell your friend you really adore her but your education comes first. If she really want to hang out and go shopping why not go on the weekend? Peer pressure is always tough when you are in school, but just stick to what you feel is best for you. You said you don't want to go nor do you want to mess up in school, so just tell her no. A real friend will understand. I hope this helps!