I am going out, doing things, even though sometimes I *really* don't want to. Trying to keep a PMA and stopping myself when I start to think about anything more than a day or two in advance.
Taking it a day at a time is fine. You're still really new at this and it takes time to get to the stage where you can think further ahead. We've all had to force ourselves to do stuff when we didn't feel like it - heck, I had to do a family Christmas Day like nothing was wrong when BD was less than 24 hours earlier.
There'll be times when you just want to curl up and cry, or scream and throw things. Crying in the shower is really therapeutic, and no one can see you doing it either. Venting or just journalling on here will help as well.
As for detaching, I found it so much easier to start detaching after my H moved out. After that point, we both had our own space and I wasn't walking on eggshells all the time.
Both 50 S14 M 16 yrs (his 3rd; my 1st)
ILYBINILWY - 24 Dec 2012 H moved out - 27 Jun 2013 Legally separated - 6 Sep 2013 Closing the door and changing the locks