Does he like you or is he just nice?
If hes just nice, he might listen to you, but his eyes will probably be elsewhere. But a guy giving true, prolonged, and frequent eye contact is a clear sign that the guy is interested in you romantically. Increased eye contact doesnt look like staring. He wont make you uncomfortable with his gaze.
How do you tell if someone has a secret crush on you?
To tell if someone has a crush on you, you may interpret their behavior towards you. If you notice that they are a little more nervous around you than usual or if they seem a little more attentive and go out of their way to initiate conversations with you, then it is likely that they may fancy you.