Of course its not note the sarcasm. you are lying, you bluntly have ms smith and other classmates in there and then you have Myles. if its not the Myles your talking about there shouldn't be a problem changing the name.
You cant use actual people names unless you get there permission you know. Take Myles out please. Like seriously, if you were to publish the book it would be not valid to the identity terms. Not cool Zella.. Not cool.