First of all, I am sorry that this is happening in your life...

I don't have much advice to give you, but a couple of things stand out for me....

She will not "get in touch with her passionate side". It just won't happen. Especially if you're just hoping and praying for it.
If she's fine with the way she is, then you're not likely to change her mind.

You say she "doesn't give any indication" that she's open to therapy. It sounds to me as if you were not strong enough in your request.

I would be more clear....I don't know what kind of dynamic you have, but you need to tell her that you are serious (and, for God's sake, follow through).

She needs a medical evaluation including a hormone levels test. She must attend therapy with a specialist. You will be making these appointments for her (and DO SO)
If she is not willing to do these things, make it clear that you will be moving along.

This sounds kind of harsh, but unless you want a sexless future, then it must be this way. Or accept your life for what it is and know things won't change.

As a woman, and from a personal perspective, I'll do what I want unless definite lines are drawn in the sand.