Alright I did the research, turns out it was a fan of his that said that:

i-want-my-iwtv:

Y’know I don’t have the time to go around checking sources, so idk if I believe you. It might be his quote. Might not.  

Even if it isn’t him, it’s a lovely image and you can pry it from my cold, dead hands.

A 2011 GoodReads discussion board also noticed Tiffany’s comment, and pointed out, “Tiffany’s post was from July [2011] while all the posts that mention Rickman with [the quote] weren’t until a couple of weeks ago [in 2011].” 

And a fan site dedicated to Alan Rickman also claims he never said the quote. “A fan said this about themselves and ever since Alan Rickman dedicated blogs reflagged that quote, people are now under the impression that Alan said this.”

I think he would have agreed with such a sentiment.

So for future reference: if you’re going to correct anyone’s post re: the source or any other reason, YOU do the homework first, and YOU provide the link, k? That’s only fair 😉