You and I have similar lives. I too have the “million-dollar family”, boy and girl, plus a very understanding spouse.
But I do understand your loneliness. Not sharing my feelings drove me nuts! So, I finally realized that I needed to make friends just like us, both online and IRL.
I just recently got involved in my local trans community and have become active, but not necessarily “activist”, as in burning my bra (I’d never do that!). It’s nice to have a shoulder to cry on and to share a laugh with my friends here and abroad (we do look good when all dolled up) I’ve gone from dysphoric to euphoric!
Honestly, I’ve never been happier!