Jen - If is not part of your package. Check with Amigos Del Mar for a day trip to Turneffe Atoll or the Blue Hole. I'm sure your package includes local diving but to get some fabulous diving, do the day trip if you can. Your frined can probably go along too as a snorkeler.
Check out BC's bar next to the Sunbreeze hotel where Aqua Dives is located. They have an awesome BBQ on Sunday's and have cheap, quick eats on other days like awesome burritos and sandwiches for cheap. Tell the crew at BC's Robert and Loie sent ya. You'll be treated well.
Enjoy your trip and dives. Wish I was going as I got dive bug pretty bad