Larry is genuinely in love with Maya. All the times he makes comments about how she is different from other girls and wanting to steal her heart are his honest feelings. Maya does not at all return his feelings and tries to ignore his proclamations of affection. By the end of T&T Larry had given up on Maya suspecting there was something between her and Nick. Instead he became fixated on Iris because physically she is very similar to Maya. So when he heard that Iris also had feelings for Phoenix, he felt doubly betrayed. His fixation on Franziska, however, is his attempt at someone entirely different. He’ll take anything to fill the gap.