Thankyoubeyonce's Manga

I just don't get what Fu Rin was trying to do her whole life , so she was sooo lonely and got insomnia from being so isolated while training to be a guardian, yet she never try to talk to anyone like ever? It's not like that's prohibited(as she almost went hanging out with some other students one time) I mean in that cafeteria scene too, theres a shit ton of people around you can't go up and talk to a few? Am I missing something?