Answer: I think am I trying to feel better. Keep in mind this disconnection of intimacy has been happening for 12 years of the 26 we have been together.
So it has been going on for 12 years, and hasn't improved? Sounds like an issue to me.
It's just recently that she has decided we are not on the same page and she wants a separation, so I have been trying to feel better for years.
Climbing the emotional guidance scale should take hours or days on simpler topics. And even on deep topics weeks or 1-3 months, not years. It might be a good idea to re-think your strategy.
I feel a bunch of anger,
Good! (And totally reasonable). Go for discouragement and blame instead of positive aspects.
Answer: What are you saying? Is there a better way for me to look at this?
There are 2 ways to go about creation:
1. Think in great detail and vividness about a desire and feel good while you are doing it.
2. Distract yourself from the situation while you think about other things while still feeling good. What you want comes slower under these conditions but at least you are not in resistance.
The issue is when you are trying to distract yourself about a thing that you can't deactivate in your vibration: like a person you live with and see every day, or your sexual desires which keep coming up again and again and it sounds like you are not satisfied with the sex you are getting. Since you can't distract yourself from these things for an extended amount of time, it is more efficient to directly reach for relief on the subject to achieve improvement.