Why does Edward love Bella?

Because In midnight sun, Alice sees Bella and Edward and Bella together. Edward didn't want the future to happen but it must or else he have to kill Bella so he chose the other choice. Because #1 Alice's vision #2 Because he just couldn't help it. no one can.

Alright here is another good answer.

Ok. Edward loves Bella because of how pure she is. She is someone who isn't like everyone else. And she is also beautiful and has an old soul.
Edward loves Bella because she is different from everyone rlse, and he can't read her mind so it makes him wonder what she is thinking, and they have chemistry.