You could simply do the *normal* tea, just the two of you, at the Gardenview Tea Room. No characters, no party; just you two having tea. The "Princess" tea (called "Prince" tea when ordered by a male) is quite tasty and is herbal (so they would remind me it's an "infusion" and not a tea), and there are other herbal infusions, or there's chocolate milk. You can get things a la carte,or get packages of food/beverage for each person.
I've now done it something like 3 times, with a variety of different people, and I think it's just wonderful.
To get reservations you have to call; no online ADRs for it. (probably because of the confusion between Perfectly Princess, Wonderland, and *normal* tea room concepts)