Serena dating 2016
In the finale, Dan and Serena get married, surrounded by friends and family.
Throughout the series, Serena has an on-again, off-again relationship with Dan Humphrey, the two have the longest running relationship on the show.
Through the books, she realize that she truly loves Nate, but he is still Blair's boyfriend.
In the thirteenth novel, she decides to stay in New York to be with Nate, but at the end, he leaves to not get in between her and Blair.
Soon after, Nate reveals to Blair that he slept with Serena before she left town and as a result, Blair begins to ice Serena out of her world (The Wild Brunch).
During Ivy Week, Blair publicly outs Serena for having alcohol and drug problems in front of representatives from several Ivy League schools.