A trip maybe?

I've been in St. Lucia for four months now, and I've done most of the big tourist things to do on the island, often more than once. I'm thinking it may be time to take a long weekend and head to somewhere else in the Caribbean. Book a resort (or hostel, but I don't know if they have them in this part of the world) and spend a weekend and have a "real" Caribbean holiday.

I'm trying to think of places to go... Grenada? St. Kitts? Suggestions??