updated 03/01/2013 AT 9:00 AM ET
•originally published 03/01/2013 AT 9:45 AM ET
"I feel like all I've been doing lately is setting him up," Lawrence, 22, told MTV of her Silver Linings Playbook costar.
But interest in the actor (PEOPLE's Sexiest Man Alive in 2012) is so great that the actress has had to strategize.
“I was like, ‘You know what? I’m going to save time, I’m going to get you a booklet of pictures of my friends and you just go through and pick them out,’ ” she joked. “Because this is getting exhausting for me.”
Though he plays her love interest in their romantic comedy, the sparks between them are onscreen only.
Says Lawrence, “He’s my brother.”