I'll be on the Celebration to Cozumel and Cancun on May 12 with my pre-teen daughter. I'd like to combine shore trips if anyone is interested. I've got one booked in Cozumel that we could add on to, a Jeep/Snorkle Tour with Aventuras Naturales, which I have heard is fabulous and off the beaten path.
Cheryl, I suggest you talk to the staff at the Shore Excursion Desk. They might be able to hook you up with other singles. I also suggest you and your daughter go to the Singles get acquainted party. I have seen many teens there, and you might both make new friends to hang out with for the cruise.
Have fun, and let us here on the Message Board know about your cruise when you get back.