<human>: Can you give me the gist of the text in a nutshell?

My good friend, who I'll call Jane, of 2 years and I are starting to fall out a bit. We both see each other every day at school, we have a few classes together and home room.

I don't know if this is all in my head head, but lately (past 2 months) I have really been struggling to keep up with our friendship. I don't get any joy out of it anymore-- we are starting to lose common interests and I just don't feel happy with our friendship. She doesn't seem to be interested in me anymore, it feels like she has replaced me with our mutual friend, who I'll call Lily [16 F].

Lily and I were really good friends when I was younger, and we have kept acquaintance throughout the years. Lily and Jane became friends at about the start of this year, but only in the past 2 or 3 months they have become quite close.

They have been seeing each other out of school together, which has hurt me quite a bit that they haven't invited me. I feel really vulnerable because I don't have many other friends besides acquaintances. I have also been dealing with personal issues like mild depression and anxiety lately so that doesn't make it any better.

Feeling left out has made me feel very forlorn and inferior. I don't want to confront anyone-- it's not like that. I just don't know how to cope with these feelings. I know this post seems like my issues are unimportant because I'm a teenager, and most teenagers friendships don't last, but I feel like I'm really struggling with my esteem. All of my other peers seem to have good relationships.
<bot>: Friendship of 2 years is diminishing, I'm not so worried about the friendship but rather how I'm going to cope with personal struggles in the future.