"nobody showed up" for me either, so I kept my secret for 31 years. It did me no good at all, which is why I'm here, why I've been in therapy for many years.
Disclosure, and asking for help, are the hardest things you're ever likely to do, and I wouldn't say to anyone that what comes next is easy either, because it isn't.
But it is worth it. Every bit of hard work, every bit of painfully released emotion becomes one less bit of baggage to carry with us.
I know that like me, you're lucky enough to have some wonderful support as well. And I would say "use that support, involve her in your healing".
It's hard to do I know, we feel as though we're pushing all kinds of crap onto someone we love, but that love is the foundation that will support you.
Take care, and come back as often as you want, there's some great support here as well.
Go confidently in the direction of your dreams! Live the life you've imagined. As you simplify your life, the laws of the universe will be simpler.
Henry David Thoreau