RejectedByLife

So, If she says that she felt left out, Maybe try to introduce her to this other girl if she feels left out, if they become friends too, then maybe you can all be friends and she wouldn't feel left out.

I know sometimes it's hard to try and include everyone, But just try, It's always nice when you get to do something with multiple people who are all friends

(If there's still a problem, or this didn't help, comment below and il try come up with some other ideas)