Do something physical: run, walk, go to yoga. Shift the energy.
Turn blame into problem-solving: this is crucial. Write down one step, one small thing you can do to move forward.
Talk: Chat it out with someone you trust, not necessarily to solve it, but to get it out there.
Be kind: to yourself, of course. Breathe and realize that everything changes. Everything.
Call it a day: Have a nice warm bath, curl up, read or watch tv, and sleep.
There is never a circumstance that you cannot accept, change or leave. Just don’t use it as an excuse for giving up.