Guys: Break?

If he says "im fed up of you, I want to take a break!" he probably meant "im fed up of you, I want to take a break!"

Take him at his word, take the break. Otherwise, he might force a break, and you don't want that.

Did he say or do anything that would cause you not to take him at his word?

I'm not a guy but I've done this before. With my ex-boyfriend, I told him we needed a break, because I just really wanted to be single, and I wasn't happy anymore, and we didn't end up getting back together after the 'break.' This was a wimps way of getting out of a relationship, I admit it.
In your situation, you need to let the break be, but don't let it be too long, most guys will come to their senses but if he's saying he's fed up with you, you need to let him calm down. The break is for the guy and girl to see how it is without the other. But if he ends up saying he doesn't want to end the break, then you shouldn't push it, because you don't want to be with someone who doesn't want to be with you ;)