Oh goodness, I've just read your update, how wonderful!
I LTB over 5 years ago, after a similar experience to yours, OP - I was lonely in my marriage, and felt confined. ExDH is a brilliant Dad, but I couldn't be the wife he wanted me to be, I wanted more.
So I ended it. It was messy and horrible, and I discovered things about my marriage and exDH that I had rather not known, but which explained some of the things I'd been feeling. His honesty during that period was refreshing, though, he told me that I has become "the type of woman he despised" - yet when he said it, I felt more alive and real than I had for years.
Since then, I have spread my wings and flown! I am now the person I hid away inside for so long!
I have realised my dreams to own my own business, and I can indulge in voluntary work that takes me away from home without feeling guilty. I now know what I enjoy and dislike - rather than conforming to the way I knew I was expected to be.
And, I have an amazing partner/husband by my side, with whom I share my life. He's my friend, my support, my lover and I can't imagine life without him.