Heh - it's a saying. Something you get to say aloud. If you say it without someone aware, it sounds like something else. Generally (not in this case, but generally) when someone says "You should..." they're insulting you or trying to give you an ideal to live up to. So a quick rejoined is "Stop shoulding on me." Because, generally when someone says "You should really be a better person," it feels like we're getting dumped on. 

But in your case, that was perfect. :) So I just got to be silly instead. 

And maybe you are. Your writing is amazing, so perhaps you've gotten someone intrigued? Or maybe they're trying to figure out if you would be a good partner? I do that.