[thaack]

Was in similar situation. For me, what worked was filling up my time with productive fulfilling hobbies/tasks. This kept my mind off the drastic change. Think of all the things that you wanted to, but didn't get to do because you didn't have time in your previous routine.

What worked for me was going to the gym during the weekday nights, then I picked up volunteering at a museum that I love on the weekends. Also spending a lot more time on a side project that got put on the backburner when my relationship was taking up a large amount of my time. Find what works for you.