Best girls never get the true ending.
I usually like childhood friends but she was my favorite in the vn
Best girl my ass.
But that's not Kanon OP
not best gril, but still okay
I just apply the 'alternate reality/dimensions' to VNs, with all endings being canon. Sure there are still 'True ends' for them, but if all other routes bar them don't count they lose their impact.
I really need to replay this VN though, I think I got the 'good end' and thus didn't experience the gut-wrenching sadness that other anons have said, and now I've been somewhat spoiled over what happens in the true end it will probably lose a fair amount of its impact.