1) WHen Gunny is interviewing her for her admission and she says she is joining for him.
2) When Gunny acts like he was hypnotised by Vidya.
3) The scene after the Delta point drill where she asks him questions and he answers placing his finger in the thread.
4) The scene where he looks at her thru the rearview mirror.
The funny thing is that in one of the earlier episodes Gunny was telling him how he was against love and Abhimanyu tried to explain abt love to him thru a song. Such a person is falling in love.