Remember, it's okay to want/need to be left alone and take some space from your family. Verbalizing that need is actually a good thing and it shows that you know how to speak up for what you need in a healthy manageable way BEFORE you lose it!
Contrary to what many parents think, we don't need to be on all the time and we don't need to appear to be functioning at our best, all the time. Quality of quantity! Even now...It's actually beneficial for your family if you can find the appropriate words to express yourself and your need for a break. Expressing our emotional and social needs, kindly is walking the walk of a good role model, parent and caregiver.
Take that break when you need it, be in control emotionally. YOU are a ROLE MODEL for your child.