Absolutely normal, typical, and maybe even as far as expected.
It's not rational, but feelings often aren't. And in some ways it follows the same pattern as grieving - how long differs from person to person and also varies by the intensity of the particular "loss" (as in, it sometimes took me hours or days, sometimes months, depending on how hard a specific change hit me), and while it does fade, it may never go away completely. But reduced to 1% of passing nostalgia is close enough, right?
Personally, I'd say *don't* fight it. Don't necessarily track him down and make him cope with your feelings if - and ONLY if - you think it's something where you don't want him to change anything about how he's handling things and you just need to adapt, but feel free to vent to friends (or here) and/or to let yourself sit alone and feel and mourn. Your feelings *do* matter, you are entitled to them, and you shouldn't try to suppress everything for his sake.
My wife transitioned three years ago. I still have occasional moments where I miss lying on a flat chest, or how she used to smell, or how gorgeously her voice rumbled. I don't *say* so, because there's no reason to be hurtful at this late date, but I don't feel guilty for feeling it. (And back when she was "in process," I did occasionally say either "look, I'll get used to it, but I'm gonna be sad for a while" or "could you hold off on changing anything else for just a few days so I can breathe?")
