Space is good for even healthy relationships. By space I mean not using your every waking moment with them. I disagree with "taking a break".
To me "taking a break" means interrupting the relationship of bf/gf to determine if you want to be with them. It usually ends with a total break up. It's just an excuse to date/sleep with other people, imo.
Giving someone space should always occur. You two are still bf/gf but you may spend time having a life outside the relationship. And yes, I WILL make the relationship stronger.
If you can't handle me at my worst, then you sure as hell don't deserve me at my best. ~ Marilyn Monroe