I really loved Willow and Oz but I always thought Tara was her soulmate. I mean I don't think Willow would ever have even considered dating girls if she hadn't fallen for Tara. She even said 'It wasn't women, it was one woman'. And for love to cause that big a life change- whoa. Plus, Tara brought Willow out of her shell even more than Oz did. Plus, I love Tara.
So sorry, Oz!