Dear Janet,
I have heard your problem and I think it's not an easy one, but I do have some solutions for you. As you said, you are a very popular girl, who has a lot of friends, but two of your friends are trying to copy from you. It's making you feel uncomfortable and stressed, and even hurts you and your grades. Now you have a dilemma between(ww. - whether to help....but hurt...") helping them, but hurting yourself, or telling(gr. - tell) them you don't want to let them copy from you and take the risk of being rejected by them.
Look, you mentioned the opportunity of hurting them if you don't help them, and I think this is a wrong thought. If you help them, they will always choose the easy way of cheating and lying. Finally(ww. - Eventually), in their future it will hurt them, so if you let them copy from you, you are not helping them you are hurting them. Moreover, I think you should think about yourself in this whole story, someone who doesn't take(ww.) of himself will not achieve his goals in life.
In addition, you said you had a lot of friends, and as your peer, I know all your friends are important to you, but you have to think:"Is someone who (is) hurting me my friend?". I'm sure your answer is no. So tell them your problem and be sensitive but assertive. If they tell you they don't want to be your friends, let them go and understand they only use(gr. - use the present perfect) you as atool to(ww. - for) their succeed(ww. - success). If they tell you they understand you, I'm happy to tell you: You have two true friends.
Janet, doing the right thing is not always easy, but it's not impossible. I hope you solve the problem and keep the momentum of your success in school.
Ido
It's better, but you still have a few mistakes. Please correct them as well (87)
Daphna.