I see many statements in your post that could have come from me as well, and I am only starting along the path that you have walked. I don't know what encouragement I can offer - other than to say you are not alone in how you feel. You say you still love your spouse and would gladly drop everything to go to them - ditto. You say you have lots of anger - ditto. Thirty years of relationship - ditto. Finding detachment so incredibly hard - ditto. I ask myself the same questions, wonder how this can be, wonder how to get thru this. You are definitely not alone out there. For me - I am taking one day or one hour if need be at a time. It sounds like you've made progress - so really - look at the small steps you've taken already - and pat yourself on the back that you've moved forward. I struggle daily too - but I can honestly say when I concentrate on myself instead of thinking of spouse - I definitely do better.
Me: 48 W: 47 M: 25 years T: 30 years S24, D21, D11 Bomb dropped: "Not in love with you" 10/09 Separated Feb 2010