Because he loves her why else.
At the Cullen's house
Edward Underdown was married to actress Evelyn Ankers. They were married from 1942 until her death in 1985.
Isabella
its in the 3rd book, eclipse under the chapter compromise "Isabella Marie Swan, I promise to love you forever. Every day of forever. Will you marry me?" <--- Edward said this to Bella.
Isabella of France (sometimes called Isabella, the She-Wolf of France)
Edward's future wife is Isabella (Bella) Swan, who later becomes Isabella (Bella) Cullen.
The show is geared towards a younger audience, and Phineas and Isabella are only kids. They will never marry each other.
Yes, Edward Jenner did marry.
Yes, Isabella of France was the famously beautiful wife-consort of Edward II and the mother and later regent of their son Edward III.
Probably not.
Yes she DOES!
Isabella Swan is daughter of Charlie Swan, human, and not married to Edward. Bella Cullen is Isabella as a vampire and maried to Edward Cullen. ;P