Eek "the talk"
I had so many such talks with my dad as a child and all through my teens, I know all about how your heart is feeling! Through all of them, I never admitted the truth to him. I guess I just wasn't ready.
I want to say something about parents' blindness-so despite getting caught wearing girl's stuff umpteen thousand times growing up, I was able to get out of those talks every time with him having accepted that it wasn't anything to be concerned about. "Oh I was playing Smurfs and I was just being Smurfette when you walked in" lol.. I never thought I actually convinced him, I totally assumed he was just letting me off the hook. I mean seriously, after 20 or so times would you really believe a word I said? 30? He was far from an idiot. But then when I finally came out to him a couple years ago, he just couldn't believe it. "but there were no signs."
So I'll say you should tell them if you feel ready. This is an opportunity you should take advantage of, believe it or not. Not fessing up did not work out well for me.