Yes!
If you need a bit of space and extra freedom, simply talk about it with your partner, explain why you need it and take it.
The fact that you are in a relationship does not mean that you have to give up your personal base.
You stay an individual even if you function in a relationship and sometimes, this individual needs to recharge, find back energy and inspiration.
While this might be slightly challenging for your couple, you don't need to give up on yourself and sacrifice your life in the name of the couple's unit.
You don't need to give up on your couple either! A week break is not the end! It is a transition.
Yes! do reassure your partner and tell them exactly what is going on and that you will be back soon.
Pu it this way: taking a bit of distance (like taking a trip by yourself or with some friends) could save your marriage and boost again the fun and pleasure you have to be in it.
It is often by taking some distance that you realize the value of what you have.
This is why taking some distance might be a good idea if you feel this is what you need.
http://vitalcoaching.com/vitalcouples.htm
To your couple!
vitalcoach