Stay at Tensing Pen. One of the Rock cottages and Seagrape (lower) has a/c if you need it like I do...you can pop the question out in the hammock hut then walk next door to Catcha for a nice dinner...if you let them know ahead of time they can set up something really nice for you...or ask her at Catcha when you are there for dinner, it's beautiful there at night.
Congratulations on your upcoming engagement