Yes, I am going to just swap it in the current setting. I'm not going to tell him because it would hurt his feelings and he would never know the difference anyhow! He doesn't know anything about jewelry and he is not observant I say that in the nicest way possible lol. The stone is about the same size, so I don't think anyone will know.
The problem is I see so many other shapes on here that I like! He would notice if I wore a pear or a cushion (which I like also)