Scenario 1: Bella dates instead of being an adrenaline junkie to see Edward in her visions.
"Bella I never want to see you again. It will be as if I never existed."
Bella sobs, she goes into a deep depression for many months. Her relationship grows with Jacob and Charlie along with Mike, Jessica, Angela, and the other dude *teehee*. While those relationships grow she is single and she starts dating one of the bachelors, hence Jacob, Mike, the other dude. So she dates one it doesn't work out goes through them until she gets to Jacob. They are already best friends so they skip that stage. Blah blah blah, boyfriend girlfriend. So Bella doesn't jump off the cliff because she got over it and she isn't thought dead . The Cullen family stays in their new home and she doesn't go to the Volturi or see Alice. She forgets about Edward over time and Bella and Jacob have werewolf babies. A little boy, lets call him Jeremiah, and a younger girl, lets name her Elizabeth. When Edward finds this out he comes back of course ticked off because he always loved her and never got over her. So there is this big fight between Edward and Jacob, Edward gives up and Bella thinks that he doesn't care. She has no relation to any vampires so she never becomes immortal, she grows old while Jacob stays young and she dies at lets say the age of 87.