SUBREDDIT: r/relationships
TITLE: My boyfriend's (16/M) mother (age unknown) expects me (16/F) to be like his older brother's wife?
POST: It was brought up in conversation quite some time ago, but I began thinking on it and it just bothered me. 

Her exact words were more along the lines of, "I said to B that he better find a girl like W." B being my boyfriend. 

Now I'm expected to live up to an apparent high standard? I'm sure she didn't mean any harm by it, but I brought it up with my boyfriend and he simply said, "She just loves W." 

I'm sure W is a smart, pretty, talented woman and though I'm sure his older brother already hates me because of an issue that happened long ago, I would like to meet her and at least say hi so she knows my face and knows that I'm not actually as mean as portrayed. 

Am I over-thinking this? Should I just let it go?
TL;DR: 
I feel as if I'm expected to be somebody I'm not by my boyfriend's mother. Should I just let it go?