Not sure how to get Lina up to two love, I currently can think of one scene that does that and I don't even remember how to trigger the scene.
Viewing post in Public Release Version 0.17d: Bazzongas comments
Most of the scenes where you meet Lina while she is spying on people at saturday midnight will get you two love. Beyond that she does need a bit of a refactor as a lot of her love points are tied up with photo trading which you can't have while Haily is there... I would like to solve that but am waiting for Lina to win a development poll.\