Edward and bella relationship:
It is like they are under a spell, they can't NOT love eachother. Bella is brought to him because he has things about him that are supposed to bring in his prey, but since his family is "vegitarian" he has no point to kill her. In the beginning, he tries to tell her that she should not be anywhere near him, and that he is dangerous, she trys to figure out what he really is.....on top of him saying this, he keeps coming back to her, talking to her, saving her.
Edward does not understand what exactly makes him love Bella as much as he does, but he thinks that a small part is her smell. And, of course he loves her for her but there is much to be discovered for him. He knows that he should not love her, or be anywhere around her, but he can't help himself, and he does not want to hurt Bella by leaving her.
So they fall in love, and over and over, no matter how hard Edward trys, he cant' get away. He knows what's best for him but he wants her instead.
(this song on here is perfect by the way =])
Here is the Edward's music. I love Bella's song. It's now mine =) teehee.
( i like this one ALOT)

( same here GOOGLE.com)
(I don't own this picture I found it on google!)