Thanks to everybody for your responses.

I don't think telling her is such a good idea... she's not that kinda girl to accept such things, plus I want to begin transitioning "on my own" so to speak, without baggage or worries. For me it's whether I let her go or not but from hearing from other people this "feeling" only gets stronger (and from my experience, it is). Plus, I don't want to be the talk of her friends, family, etc. We live in a social media world, people talk and I don't want to be part of that gossip. I don't even plan on telling my family until I'm further down the transition road, where I'm certain and when I'm doing my RLE (they live abroad, I don't see them that much). No, go it alone, meet some people in the trans community, gain an "outside" support network and go from there...