Should I stop being their friends?

I think there is alot of drama going on. First, I don't think its proper for Jenna to insult you in front of your other friends. If she was secure enough with herself, she wouldn't have to make you look bad in front of others to make herself feel good. My suggestion is talking to her one on one about how that makes you feel. She may not be aware that she is doing it or how it really makes you feel when she does it. As far as not being any of their friends anymore is entirely up to you. I do kind of get the hint that you don't care for Jenna that much as a friend because of the statement of wanting to punch her. Truthfully, a real friend doesn't go around making such statements, so you may want to consider whether she is worth being your friend or not. I think your having a hard time fitting in with this crowd as well and I think there is alot of drama going on. My suggestion is, you don't have to drop them as friends, but don't invest all your time into just being their friends, you may be losing opportunities at making new friends if your always caught up in the same old drama. Last and not least, always be yourself. You can't change how a persons acts but you can change how you react. Once you feel good about who you are all the rest will fall into place.