A lot of us have to wait till mid March o longer for Midnight to come out. But I've seen tweets from people in Australia(where it was released today) who have the book about events and frases regarding DE.
WARNING: VERY SPOILERY
-Damon to Elena: "Will tu remember? Just that...I loved once, just once, really, in my whole life. Can tu remember that I loved you?"
-"There was no world for her if there was no Damon"
-Stefan apologizes for coming in between them, he didn't understand how much they loved each other.
-In the motel she held him all night because he didn't want to feel alone