I dont think there's any chance they would take you without a levels to be honest, so you'd have to just stick with it for another year and remember that it will lead to what you want in the long term
Is there a different college/sixth form you could transfer to where you have friends?
If not, as much as it might be a bit lonely to start with, but you'd make new friends through your a2 classes, and if your friends aren't around then you might concentrate on lessons more so it might be beneficial academically if that makes any sense