Here's mine. You forgot Jasmine in your list by the way :)

Snow White and Prince Charming (from Cinderella)
Cinderella and John Rolfe
Aurora and Proteus
Ariel and Hercules
Belle and Phoebus
Jasmine and Tulio
Pocahontas and Tarzan
Mulan and Miguel
Tiana and Dimitri
Rapunzel and Aladdin

Ariel and Hades
Cinderella and Phobeous
Aroura and Proteus
Jasmine and Tulio
Pocahontas and Tarzan
Mulan and Miguel
Tiana and Eric
Snow White and Dimitri
Bell and Jim
Cinderella and Jim
(I don't consider Rapunzel as a Disney Princess....sorry)

Mine are....
Ariel and Jim (and Aladdin and Flynn and John Smith... but Jim's better)
Rapunzel and Eric
Jasmine and Sinbad
Snow White and Charming
Cinderella and John Smith (maybe.. thats kinda iffy)
Belle and the Prince (Again iffy)
Tiana and The Beast/Adam
Mulan and John Rolfe(iffy)
Pocahontas and Shang
Aurora and Lumiere (in his human form)

Mine:
Ariel and Aladdin
Rapunzel and Eric (or Hiccup)
Jasmine and Sinbad
Snow White and Prince Charming (Cinderella)
Cinderella and John Ralfe
Belle and Phoebus
Tiana and Beast (Adam)
Mulan and Hercules
Pocahontas and Tarzan
Aurora and Thomas (Pocahontas)

I'm not yet really sure with the others, but here's my list for the sure ones:
1. Aurora/Prince Edward [Enchanted]
2. Jasmine/Tulio (or Sinbad)
3. Ariel/Aladdin
4. Pocahontas/Tarzan
5. Rapunzel/Eric (or Aladdin)

Here are my unsure ones:
6. Snow White/Phillip
7. Cinderella/John Rolfe
8. Tiana/Beast(Adam)
9. Belle/Clopin (or Dimitri)
10. Mulan/Prince Chulalongkorn [The King and I]

@MegaraxHades17 oh you're right. lol i'm so stupid xD