Don T Go Changing
What does it mean to not change on the way? 3
If this is your lover:
I guess that means he still loves you for who you are ... he just had to leave you for another reason ...
Don't change
This means that this person loves you because you are who you are, when they are gone don't become anyone else.
That means they don't want you to change their absence because they like you and who you are.