What To Do For Abnormal Thinking Of The Child?

I have a 12 year old wonderful daughter. She has always been what I term a bit of a worry wart, yet very even keel. The other night we spoke for a couple hours after seeing the movie The Maze Runner. She feels very passionate about not wanting to go to school. Now she does ok, has friends, is in French emersion and hates it. She does not want to switch out because of friends and because she knows it is good for her. She told me she thinks about suicide. Would never ever do it, just thinks about it sometimes. Hates that she has to spend time being controlled by her teachers/school when you never know how much time you have in life . I am really worried. She said she refuses to talk to anyone about it. We have great communication but I want to say things to help her yet not sure what. Please help.