Wow, we're similar in recent history!
I was married for 23 years, she and I were emotionally dependent on each other (I for a "mother figure", she for a "ideal husband") We had 3 kids, haven't interacted with them since we separated (2012, divorced in 2013).
When I moved out I was terrified too. I played the "what if..?" game before moving out to try and get a feel for what might happen. My biggest worry was quiting my job and fleeing to live in my car...but since I thought that might happen, I was able to make a mental workaround. After just a few months I knew I was going to be able to live on my own, and in fact came to love it and begin thriving. Teddy was very important during that time, as was journaling and drawing pictures showing how I felt.
I have tried to keep in touch with my kids, but they keep their distance...but I still have to live and heal, so I'm doing this without them. Ya gotta do what ya gotta do!