I Had A Group Presentation But I Froze And Forgot My Lines And Started Stuttering. In Other Words, I Messed Up BAD. I Feel Really Bad, Especially To The Other Group Members Cuz They Were Great. How Do I Apologize?

Stage fright, huh? That sucks. I think all you have to do is explain that you freaked out in front of the large group of people. You get stage fright. Hopefully at least one or two people in your group will understand. Stage fright happens to a lot of people. It's nothing to feel bad about. As long as YOU know you tried your best to prepare, that's all that matters. If your friends don't forgive you- then at least you know that you tried to explain what happened.