Sh's not your reality and her opinion should actually have no bearing on your transitioning. This isn't something you're giving a try, this is your soul. This is who you are. If you're lucky enough to look good and pass, awesome. But there's a ton of cross dressers out there that look just gorgeous. They also have no intention of changing genders. It's a past time, a proclivity, a hobby. For the tran woman, this is something we reconcile to make our world right. This is our truth. You are young and after HRT will be quite beautiful and feminine. Whether she digs it or not, is behind you or whatever, has no bearing on any of it. Even if none of those things I just mentioned were true or not. If she loves you, she'll come around. If you're trans, everything will be okay.