Damon returned to Mystic Falls with the intent of bringing back Katherine, but instead he found Elena, the same beauty with all of the good qualities he sought in love. Their chemistry is smoking hot and they forgive each other above all else. Damon has humanity and Elena feels free when they're together. That's magical.
You want a love that consumes you. You want passion and adventure, and even a little danger... I want you to get everything you're looking for. But for right now, I want you to forget that this happened. Can't have people knowing I'm in town yet. Goodnight, Elena.
I wanna say thank you for giving me everything I always wanted. A love to consume me, and passion, and adventure. There's nothing more I could ever want than for it to last forever, but it can't. This is the last time I'm gonna see you. This is goodbye, Damon.