I need some serious feedback from you guys

[klickaroos]

approach him and tell him that it's rude to stare then ask him bluntly why is he staring at you?

[Love Portion #9]

"What does it mean when a guy stares at a girl that long and that much?"

It means he is cross-eyed! You must stare at him alot to notice he stares at you. He is probably saying the same about you. If the guy have not approach you, just stop paying him any attention.