For all eternity- a fallen fan fic

Fallen fanfic about a demon Cam and an angel Elizabeth. An angel and demon in love, it was a forbidden love. After centuries of running away from her boyfriend, Elizabeth returns from England Elizabeth goes to Swords and Cross. When happens when she see Cam again for the first time in over 100 years? Will it be a happy reunion? What did he do when she was gone? Story has some spoilers for the rest of the story, sorry I suck at summaries, plz read this is my first fanfiction!