Hey there!
My boyfriend (ftm) has been transitioning for 2 years now, the physical changes started happening about 2 months after he started using T which was in October 2016. Most of it has actually been pretty easy to live with, considering my boyfriend always had boyish looks and even features. So I don't have to go through hair grow and such, it was always there.
Today though, he mentioned to me that he would like for us to stop using any kind of female private part names. That it killed him inside a little every time the words where spoken but that it's only been recent. I get it, I knew it was bound to happen but it feels like, every time something more changes, a piece of me or him dies. Yet sometimes, I can be totally okay with it. I dunno, it's weird; hard to explain actually.
So, all in all, I completely understand how you feel. I think personally, it's normal. We're going through our own kind of grievance and sometimes I think our significant other's might forget this. Just do your best to stay supportive, it's okay to cry! And most of all, keep an open communication with your significant other. I know it's helped so very much in my relationship.
I hope you have a great day!

Marissa