For me everyday brings more peace and much less anxiety. Now that I do not see her everyday it is easier to see her circus and monkeys much more clearly. Last week was a turning point where I stopped feeling anxious when I see her or talk to her. The week before was a different story though. The anxiety I also realized was more about me and my ability to accomplish things without her. I am now gaining confidence in myself so it is much less.
As for the loneliness I have my moments, but between my efforts to connect with other people and the fact that my d17 chose to live with me, I don't feel it as much as I would have thought. But I do have my moments where I miss my W. The thing is right now, I am accepting she does not exsist on this planet, so I have my moment to grieve, I pray often that she returns some day, but I place my hope and faith in God that my future will be a good one and I try to put in the efforts to be the person that attracts the light and goodness however that may look.
For my sitch the separation was needed to stop the damage and start the healing.
I'm a little envious as I was hoping my separation from my W would create enough distance she would realize it's not right to call it quits. But it appears after a month or so of separation, she's decided the exact opposite. She wants out and told me she contacted an attorney. I posted in my threat, I'm not a religious person, but 'something' is pulling me that way, as I almost went to Bible buddies with my dad today. I pray to someone, within myself, but I don't know to who, and I hope that one day I found confidence within me that you show within you. There's not much we can do right now about the emotional/anxiety swings until we completely clear our minds of our W's decisions, or in your case, existence. I think that might be a good way for me to look at it once she actually files for D. If she puts that on the table, I will work your route and try to erase her from my mind completely, clearing a path to GAL, and future planning for me. I wish the best to you.