I'm not quite sure if what I'm experiencing is racism, bullying or something else

I am a 16-year old girl from China, and this year is my first year attending a boarding school in the UK.It's almost half-term, and I haven't had a really pleasant experience in the school I've been going to. However, I'm not quite sure what I'm exactly experiencing here. Racism? Bullying? Or something else? Basically, in my new school, there are only around 8% of Asians. And whilst I tried really hard to make friends with people of European or other descent, I really couldn't. When talking to some German girls, they either would ignore me and talk in German, or they would give short answers that reflected their unwillingness to talk to me. People would also group me and my other asian friends with other asians that we never met. Recently another thing that has been happening this week is: when there is a group of Chinese kids gathering in the common area, playing a game, European boys always throw pillows that hit us. One time, I couldn't take it anymore, and I just shouted at them. Telling how childish their 'games' are and asked them if they wanted to go back to elementary school. They didn't stop.Instead, now, they have opted to single me out. But the thing is, I don't know if they can get in trouble. They always pick a time where no teachers can see them, the things they throw at me almost always never touches me, they would throw folded up paper pamphlets 2 centimetres away from my feet and head, never hitting me in the process. And keep in mind these are mostly the same people, but there are also other groups involved. It's mostly a group of 16-18 year old European boys. Can anyone help me define whats happening?