Hey there, you have been through such a lot. Give yourself a break. Let yourself grieve. I'm so sorry you had such a shit time.
I wanted to write as I've also had a massive urge to run away, just get in a car and keep on driving. The pull has been intense sometimes. It is so hard when people say, you need to keep going with your job, keep your roots down etc.
But honestly, that is what will help in the end. The roots, the work, the people you know, your new partner, and your daughter. Keep going with her, I don't know how old she is, but she may change her opinions, she still needs you even though you aren't with her as much now.
Have you thought about speaking to a doctor about your feelings? Mine were great when I just needed a cry. Just to let someone else know how things are affecting you. It is great you have asked for help on here too.
I also spoke to the samaritans when I felt at my lowest. They are not just there for extreme cases, they can help anyone. Just a voice on a phone, listening.
Take care, you can get through this.