What kind of friend are you to this person if you talk like this about her? She's just looking for acceptance. What is the problem with her? Is there some way you could help her to be more socially acceptable? There have been many plays, movies, & TV episodes based on this topic. Try being an ACTUAL friend, not just one in name only.
Help her! Put yourself in her shoes. You can be her best friend forever and she would be the best friend you ever could be privileged to have. Talk with her she will grow and learn if take the time to help her.
I'm sure due to peer pressure u feel she's not cool enough to hang w you n your friends. But I can tell u from experience, she will probably be the most successful of ur friends because she not thinking like ur narrow minded so called "friends.". U better watch out or u could be the next casualty of the group. But I'm sure u will be in good company cuz she will be ur friend anyway. interesting people come from all walks of life. She might turn out to be one of ur closest friends someday if u give her a chance. ;)
If you like her then why can't she follow you ? Having one friend can make all the difference. And if your friends make fun of you for it then they aren't your friends and as far as people you don't like making fun of u who cares you dong like them anyway...high school popularity should be the last thing u are concerned with in life