willow wasnt always the confident, dominant one though. if she was always dominant, tara might have always been in her shadow and have less room to grow. clearly, thats not the whole case, because tara can grow even when willow had control, but still, when willow starts having trouble with the magic, tara kind of takes control of the relationship. besides having confidence because of willow, and the whole thing in 'family', i think her being able to take control because willow was falling helped her grow. ...not that willow and tara breaking up, or willow having issues with magic was a good thing 🙁.