Check out my Damon Salvatore and Aria Montgomery fanfic. It is called Another Chance At A Human Life.

Summary:

Damon gets shot with a venom laced bullet. Elena forces him to take the cure, unable to get over the betrayal he leaves. 4 years later he has finished college and decided to teach History, since he has lived through a good chunk of it. He wasn't expecting to meet a student and fall for her, definitely not to help her discover who is sending her texts. Rated T, will become Rated M