Liam has begun to observe Ariel's avoiding him, maybe he went too far with what he said to her yesterday when she got sober, right?. It must probably be the reason why she's been playing hide and seek with him.
The moment he passes her by, she would get startled and run off like she has seen a ghost or something. And after running off, Liam will have to go after her, so you see they have been playing hide and seek unintentionally.
"Are you going to keep on running off?`` What's wrong with you today?You have been acting strange since after my mom and Blair left." Liam was fed up with having to go around the house in search of Ariel who finally thinks staying outside is better than staying indoors tonight and stopped her from leaving, when she reached the foyer.
