Care to elaborate? How is having two people pursuing you being Bella? It happens a lot more frequently in literature and in reality than it does in Twilight. And several authors actually know how to use a love triangle as a plot device. Meyer is not one of them.
You DO realize that love triangles, and males fighting over a woman and females fighting over a man has been occurring in life and literature well before Twatlight disgraced the book shelves and screen, yes?