Hi, what city are you from? If your city is located in the west coast.... it will be super expensive to fly to San Juan. Costs about $900.
It looks like you have different dates to cruise so if I were you I would just go to the Singles Calendar on the Home page and look for a Singles group cruise. You will have more fun than putting your own group together because you may not be compatiable with a few people. In a singles group you have lots of choices of friends to hang out with. Luci