People do not sacrifice their own leisure and interest for others over nothing. Being in an emotional affair with someone is a powerful reason for one to sacrifice their own gain just to be able to meet the other person. In such an inclination, every cost begins to look little. Another way of knowing if a person is emotionally inclined towards the other is through sacrifices they make for each other.
If a person can skip school to go see a friend, can compromise on any other commitment to be with them, or just drops anything to meet them, then it’s a sign that he’s involved emotionally.