Stay strong my friend. Every change in your life will be difficult but be the rock in your daughters life. Being alone for the first time can be difficult but you will get through it. I'm in the same boat as you, been alone for a year and a half and now finalizing separation/divorce and likely moving within next 2-3 months. You will probably not get much closure from anything to do with your ex. They will never take accountability nor should you expect any. Good luck
