If the dating has been going great, maybe you guys just need a bit more space, not really "a break." Seeing or talking to each other less often might afford the distance you require without having to part ways.
If the need to take a break is borne from a feeling of doubt or uncertainty, best to identify where it's coming from and if it's worth fixing.
If the need to break is out of the desire to be non-exclusive, then maybe you just want to keep your options open. But this might be interpreted as wanting the best of many worlds, with the other guy acting as possible reserve in case the other dates don't measure up.
I guess the bottom line is to identify the real reason behind the need to take a break. If the reason is worth the risk of drifting apart, then go for it.
All the best!