How about you mention to your (hopefully soon FI) boyfriend about making the most out of your trip and just look at a few vendors in case you guys get engaged soon.. OH maybe have him look into the photographer and tell him "oh wouldn't it be cool if we would have been engaged for our trip to take some engagement pictures there" "maybe one day we can do something like that" Then maybe he'll ask about photographers and "maybe" he'll get the hint, and scheudle something for you two... :-)
RIU is a great location, I love that the pictures will have such an awesome back drop. Their are definitly less expensive resorts in walked distance from RIU, IE. Villa Del Palmar and Vill Del Arco, they both have full kitchens so that the guest that don't have the money to eat out all the time can buy food and just cook most of their meals there. We stayed at Villa Del Palmar and It was actually nice, I love to people watch and they always had stuff going to to keep you busy if you wanted to.