My current situation

I am no longer friends with most of the people at school that i still sit with and eat lunch with. I have been wanting to move to another friend group where i am friends with a couple people in (in fact one of the girls that sits there - lets call her ruby - and I have gotten super close, shes one of my closest friends right now), but I am always very anxious when i think about moving, I want them to like me alot. Tomorrow that group is going out together to the beach and I am anxious about not being invited, especially how ruby didnt even tell me (even though I know its none of my buisness). I also feel like I have been needing a lot of emotional reinforcement lately (like i want people to always tell me that they do like me and that we are still friends - when clearly nothing has changed) I have been all in all super needy for no reason. My mood is always nervous and ive kinda lost my energy and happines i had a couple weeks ago for some reasons. I guess its because today it was kind of weird. Ruby today was obviously down, i could tell. But i dont know i was nervous to ask and im nervous she doesnt want to be my friend, even though i know she is still my friend. She has shared thigns with me that she hasnt ever with anyone else. I guess we are our escape to eachother - yet she wont leave her other group of friends so i might as well join them. Sorry if this was messy to read. I just kinda let it all out. Thanks!