Should I leave a note?

So I want a break from it all. A break from my school friends, a break from love life, a break from everything but my home life. I just finished university so it should be easy to just leave for a bit. Should I leave a note at school pretending I've left the city for a while or something? I want it to be something where people think about me and worry a little but not too much where they would call the cops or some ****..