Hey Lina
Sorry for the delay in responding.
Can you get your hands on any bondage gear?
Seriously though ... I have no idea. Guys are funny like that I think, they often need something completely spelled out to them before they get it. Perhaps leave some jewellery brochures lying around the house with certain rings circled? I doubt dropping hints (even really big ones) will work. Visual aids are usually quite helpful ... maybe leave some brochures around about honeymoon destinations! That might get him excited about having a wedding!
Good luck and let us know how you get on.