how quickly you can leave

Yesterday I went to school and at volleyball practice Thuy Nga, an exchange student from Holland, came in crying, picking up her stuff and saying good bye to us. She had to leave and is properbly sitting in the plane now. She was a nice girl but she obviously did something wrong. Nobody tells us teenagers, since this private school I go to, literally keeps such things " private". My hostmum thinks it has something to do with a good friend of mine, who goes in my class (she´s american). Anything they participated in. I don´t know, all I know I can meet her without an adult anymore. It´s so confusing and it feels like we all are standing in fog, blind and unknowledged. Another issue is that I might not be able to go to Homecoming since it is organized by some girls of my class and not by the school, which means that there migth me no adult. And if there are no adults, there is no Lizzy. That´s Cheryl´s policy. No shopping without adults, no hanging out without adults (some exceptions) It´s frustrating but I kinda have to deal with it. Well, I don´t have any choice. It is so different from Germany. I would never meet a  friend in the presence of an adult, at least it´s a rare situation. Especially not for a party. I love my hostfamily but some of the rules can bother me sometimes. But that´s how it is. Altough it doesn´t help my homesickness at all. I miss you, mum and I miss everyone else. I miss Hamburg. I miss Germany, although I love the people here. It´s just a weird mixture of feelings.
Another thing, that I´m concerned about is, is the fact that Cassandra (the girl from Norway) and Amber get along sooo well. And I don´t. I hope Amber likes me, but since we don´t really talk, it´s kinda hard to say. Amber is someone, who doesn´t show her real feelings in the normal kind of way. I can´t get her. I feel like the third girl in a friendshio nobody needs. When the have fun and I try to be in it, it just feels wrong...