A Letter To My Son

But while your sister gets upset about these things, they mostly roll off of her back.  Unlike you, they rarely pierce the skin and wound her to the core.  It’s not because she’s less sensitive than you are.  It’s because - and this might sound harsh - your opinion of her doesn’t shape the way she feels about herself.  But you, well, we both know that her opinion of you matters more than anyone’s, am I right?
That’s what I want to talk to you about in this letter, my love.  I want to tell you that you can’t let her define you.  
You’re not an annoying person just because you annoy her.  You’re funny and goodhearted and generous, and people love being around you.  I am literally bombarded with requests for playdates with you.