You don't have to leave it alone. You can still discuss the game, wether it be your impressions of gameplay videos or trailers or marketing. Hell, I comment on Yakuza topics and I don't own a PS3.
It's just that all you say is that you have never played it, or that you don't play it, or that you want to play it. Just play it! I realize it is not in stores (unless its a used game shop) but that applies to countless titles. It's easily found online, and the original is typically $20. My advice is to buy it and play it.