I have been given that advice from many- to take care of myself and concentrate on myself. I am trying.
You are right it is hard to detach sometimes, especially when you miss your spouse so much.
The area I think I need the most improvement on is communication. I need to communicate my needs better. I need to communicate my feelings better and not wait until they boil over. I need to communicate better with every day issues, like bills and schedules because I would keep all of that to myself and become so overwhelmed with what I was taking on and never giving some of those responsibilities to my H. And then the resentment would kick in. The next step would be giving my H the cold shoulder and ignoring him.... this mixed with the fact that he wasn't coming home some nights or not coming home from the bars until 3-4 hours after his work day ended...... He felt like I didn't respect him...and frankly I didn't feel like he respected me either....