Shut yourself away
Definition 1 of 1
Pro Tip 1/3Emotional Impact
The phrase often carries a feeling of sadness or the need for solitude. 
She was overwhelmed and decided to shut herself away for a while.
Pro Tip 2/3Voluntary Isolation
It's a personal choice to avoid contact with others, not forced by someone else. 
He needed to study, so he shut himself away until exams were over.
Pro Tip 3/3Short or Long
The duration can vary from a few hours to an extended period of time. 
After the argument, Jenna shut herself away for the rest of the evening.