Is it normal that i prefer school over summer break?

Where I live school is about to end. I remember ever since I've gone to school I couldn't wait for it to end, but now I don't. I don't even like my class(mates) that much, and much prefered last year's. I don't really have a main reason for it, but I do do well in school. I told a few of my friends and classmates about preferring school and most seemed a bit weirded-out, but a few people actually agreed with me. So I am curious to see what you think.