Newly separated...spouse left.

[antlers]

Good morning. These are difficult days for me, and my heart is broken because my wife and I are separated. She told me back in early January that she was going to move out, and I was shocked. I cried, pleaded, tried to reason, chased, tried to use guilt, and did all of the other things that people who are getting left behind probably do. I lost my self-worth and my dignity in doing so. I wouldn't have felt like I had done everything in my power to keep this from happening had I not done these things though...this was how I truly felt. And I now know that these things only served to push her further away.
We have been married for nearly 18 years. We have 3 children, ages 19, 12, and 11. I am 47 and my wife is 40. She is a walk-away-wife. There is nobody else involved. Her 1st night in her new place was February 22nd. Our smaller children are spending equal time with each of us. Our oldest has her own apartment. I helped her move, but I have still had trouble letting go. We would still talk on the phone, and text, even though she was often mean and rude. She has gotten more mean and rude over time. She now doesn't want to talk, or text, or even see each other when we hand off our kids to each other. "I want you to leave me alone." She has told me all along that she needs space and time. It's been a difficult thing for me to do. I know it is the best thing to do, but it's extremely hard nonetheless.
I have had no direct contact with her at all since March 24th, and this has been the longest period of no direct contact since she moved out. We mostly communicate through our children now. I do not believe that she wants to divorce.
So now, here I am, living in our home, from day to day. My heart is broken and my spirit is troubled and I am in a state of despair. I love my wife and I want our marriage to be restored. Again, we are "sharing" our children. I have read the first chapter of Divorce Remedy. I have been in counseling for nearly 8 weeks because I am working on myself to become a better man, a better father, and a better husband. I have lost a lot of weight and I am exercising regularly. This is a hard way to live.
I am more committed to my wife and our marriage than I have ever been. I have made many mistakes...I took her for granted, made things too hard on her, and we argued a lot...mainly over stuff that didn't really matter. I didn't fight fair. She said from the beginning that she needed to get away from me to reestablish her identity. She also needs to heal from the pain that she has felt over the years, and maybe even get to where she can start to forgive me. She knows that I am truly sorry, but says that it doesn't make up the years of pain and unhappiness.
I earnestly pray for the restoration of our marriage, and I am doing everything that I know how to do to improve myself in the mean time. I spend as much time with our children as she does. I need to be strong and steadfast, and I also need to not despair or give up on our marriage. I am looking for advice and support in coming to this forum. Early on, after she told me that she was leaving but when we were still talking, she said that "it was gonna take some time." She didn't want to have any serious talks or be asked about our relationship or be asked about our future. She didn't want to be asked about anything...she would go ballistic if I did.
We were separated since around the beginning of last December, although we continued to live under the same roof until she moved out. She is incredibly angry with me still. I am trying to learn to live under these circumstances. Any help, advice, or support would be tremendously appreciated. God bless all who are experiencing challenging times in their marriages.