I'm sorry to hear that your relationship broke up. I completely understand how you're feeling. On Friday, I was laid off. I worked for that company for 16 years. So, I'm mourning the loss of my job much the same way you're mourning the loss of your relationship. Believe me, it stinks.
But, we need to stay positive. This is a turning point for the both of us. Our outlook now will determine what happens next. If we can stay positive, everything really will turn out okay. You'll need to be productive and proactive. Don't let this relationship hang around your neck like an albatross. It's going to take a few days to adjust to the new situation. So, don't beat yourself up if you don't seem to have motivation. just do the best you can. if the only healthy thing you were to do for yourself today was to drink 8 glasses of water, that's still a step in the right direction.
You can't let this get you down. These things happen to us all. Don't look to the past, look to the future. Do the things you need to do now that will help you be a healthier person later. Take a regular walk. get some exercise, the exercise really does help. I'll be doing that later today.
Just think of this week as a bump on life's highway. It's behind you. gotta keep driving.