its so tough, my wife left me about two months ago.. I raised stepchildren and they are grown.. so find myself along in a big home.... you will go through many emotions and maybe even some depression. first, find a good therapst... work hard not to put your kids in the middle of things.. you need to have people to talk to when needed.. not your kids.... talk care of your mental health, so you can take care of your kids....

stay in present, the past we cannot change and we have no control of the future.. so one day at a time...

peace to you