I want to fit in with all the other girls also…try putting yourself INTO MY SHOES instead of hers for a minute…..”
That’s the first problem – what if the girls you want to fit in are not such nice girls (not saying they are not)that their opinion counts as much as you are allowing it to? That’s your first exposure to peer pressure. Do you always do only what other popular girls want you to do? BTW, I have been in BOTH sets of shoes, the person who was not so popular (because I lived out of the immediate neighborhood, though only five minutes away by car) and the person who as an adult was pursued by that “less than desirable” very needy friend (as you are being pursued right now). SO while you do not think I can understand what you are saying, I really DO. I also understand how painful this situation must be for the other girl. And it would be an eye-opener for you to put YOURSELF in HER shoes for a moment. I am not criticizing you, I am trying to sensitize you to what is happening here.
Twenty or thirty years from now you will possibly not even REMEMBER half the girls in your class, much less be friends with them. But you WILL remember and deeply regret if you treated someone badly in order to gain favor with those others who might not be such great girls themselves, or they wouldn’t hold against you the fact that you are nice to this lonely girl and leave her out of activities that you all share. Unless there is way more to this story than what you have presented so far, and this girl is a nasty and simply completely unlikeable person with no redeeming value, both you and your friends might try a new approach. Maybe if she felt other people were more friendly, she would not feel the need to attach herself to one person alone (and I commend you for having done SOMETHING that led her to believe she had at least one friend).