Hi J!
I've replied before, that I'm in a similar boat. 41, married 18 years, 3 children.
I think I knew from early on I was different, but I chalked it up as being weird, defective, or just "wrong". I spent my life denying I wanted to be a girl. Over the years, my wife has accused me a number of times of wanting to be female and I always denied it to her, and myself.
The fact that I wore women's panties and shaved my body religiously was enough for her to make the conclusion. Finally this past year after a huge fight where she again accused me of it, I admitted it to her and myself, that I am trans. However, I don't know if I will transition, although I want to, because I will lose her and may lose the children if I do. Many times, I wish I could be rid of the dysphoria and just have my soul match my body. I just don't see it happening. Funny thing is, after admitting I'm trans, my wife points out my "male" qualities and says I'd make a horrible woman...
I've purged all feminine things and acted as male as I can many times and always come back to the feminine. That tells me I am trans, whether or not I wish to be. In some ways, admitting I am trans, and thinking of NOT transitioning makes it worse... I look at myself in the mirror and dislike the masculine appearance. On the flip side though, while wearing my breast forms feels right, I also end up feeling fake, and "wrong" again.
I tend to feel like I'm spinning and spinning like a top. Just when I start to slow down and settle, something starts the spinning all over again.
You're not alone. You can PM me anytime you wish to talk.