I'm late to the conversation Savannah but I concur with the others, you made the right choice by NOT telling your wife at this time. I can really feel the excitement in your posts regarding your new found feminine side which is a very clear indication that your good judgement could be clouded at the moment by your exuberance. Please believe me when I say I want the best for you and that I'm not a TG snob wishing to rain on your parade so I can remain one of the elite few who are worthy of transitioning. (I've not met any like that here by the way although I'm sure they exist). If transition is in your future, you'll FIRST transition from WANTING to tell people to WISHING you DIDN'T HAVE to tell them. WANTING to tell someone because you're so excited is a dangerous thing in my opinion. Needing to be honest with your wife at some point is healthy and by then you'll have prepared yourself and articulated what you need to tell her in a way that suits her so all goes as well as can be hoped for. I'm a huge advocate of full disclosure to your wife as soon as the time is right.
I recognize something in b rose's comments that I'd like to echo. You might be telling yourself that you wont need to or could never transition and you might even believe it. In fact, you may never get to that point or even close to it. But the reality is, you might loose your footing once you step into the muddy water and before you know it, you'll be getting sucked out to sea. It's happened to many of us here including myself. It's not necessarily a bad thing but you MIGHT lose control the more you dabble with all of this. Sadly for some, it does cost them everything.
Lastly, I give my unreserved, resounding endorsement to the book, She's Not There by Jennifer Boylan that Clara recommended. You HAVE to read it ...or I wont talk to you ever again

Just kidding. It really is a must read for those of us in this realm!