He was an idiot.
Not all the time, of course. Definitely not most of the time. Just sometimes.
Times that included Lisbon.
He had encouraged her to go out and have fun. Told her it did her good to develop her social life, get together with friends, maybe even meet someone special.
His arrogance had created this bomb, this notion that through it all he was too special to be replaced in her heart.
Now the bomb exploded. She'd followed his advice, gone out, and met someone nice. Someone who didn't fuck around with her feelings.
Lisbon was now engaged.