Should i still be friends with her?

No. You seem to be happier with your new friends, and now you have a social life (no offense). Your friend is probably hurt that you ditched her for other people, and is jealous because she has no "other people". Girls who get so easily jealous are bad news, and you should stay away from them. Just ignore her texts, because even though it will undoubtedly hurt her feelings, you can't please everyone. In this case, "everyone" is you and her. In this situation, please yourself, because it will affect so many other portions of your life. Don't be friends with her.