Nah. It's canon. And is still yet to be explicitly refuted or disproved. Until it is, the Doctor is Half Human.
But even if hypothetically he isn't....
See that's my point. Imbuing the Doctor with this wholly other-worldly quality that he demonstrably doesn't have. The Doctor isn't Vulcan, he's Gallifreyan. And they fall in love just like us... sometimes with the unlikeliest of partners.