would it be stupid of me if i'm planning on doing chemistry at AS (drop at A2) with history, economics and music?
I've heard it's a terribly difficult A level, and there'd be no point taking such a difficult subject if I'm not going to be doing anything involved with science at university. (Which i'm not sure about)
1) Is there any university courses that accept/ has a requirement for only chemistry A level?
2) Is there any point of taking chemistry (or any other sciences) if i'm not choosing a science for my other subjects?
If you enjoy chemistry then there's no reason why you shouldn't take it. A lot of universities will admire you getting an A level as respected as chemistry even if it isn't relevant to your course
For a lot of science and medicine courses at university chemistry is either highly desirable or useful. I don't think a Chemistry a-level alone is sufficient enough to study science at most universities though. Students of science at university tend to have maths as well along with another science subject.
If you enjoy chemistry then there's no reason why you shouldn't do it. It can be very rewarding at times. However if you feel it's going to be something to endured then my advice would be to not take it.