Hi Deonna!
Happy Honeymoon, Happy Anniversary, Happy Birthday, and by all means, Happy Disney Vacation!! Since you mention your ADRs are all set, I will skip any dinner suggestions. One of the first activities that jumped to mind was a couples massage at the newly opened Senses Spa at the Grand Floridian Resort. Check it out here:
https://disneyworld.disney.go.com/spas/grand-floridian-resort-and-spa/senses-spa/
Also, I think taking a stroll along the beach of the Polynesian Resort and watching Wishes over the Magic Kingdom would be pretty special.
You could also consider a specialty cruise to watch either Wishes over Magic Kingdom or Illuminations at EPCOT, or maybe a horsedrawn carriage ride one evening.
Or, you could order champagne and other treats for your own in-room celebration through www.disneyflorist.com
I mean, the options are endless, and these are just a few. The bottom line is that even if you are just strolling down main Street USA in the Magic Kingdom holding hands, that would do it for me.
I hope this helps stoke the idea fires a bit and I wish you a Magical trip!! :)
Happy Honeymoon!!
Chris