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How to tell if a boy loves you 
Watch his eyes. 
A boy who is interested in you will likely show it with his eyes. Some of the behavior cues may seem contradictory, but they are dependent on his personality.
Options are:
 - Watch his eyes for anything that pops into his head: ,. Does he look up into the sky often, or does he get distracted by other things, like eating? .
 - If you get caught staring at him for long enough, he's likely to start to learn that you're a great catch and might even end up sneaking out of his room later. If you catch him staring at you, this may indicate that he wants to see you without the need to say hi or excuse yourself.
 - A boy who is interested in you will likely try to make frequent eye contact. He will look into your eyes while you are speaking, and you may catch him looking at you from across the room.
 - Watch for signs of arousal such as eyes widening, chest rising, and eyelids dilating, as well as sight or smell coming from him, which may clue you in to his interest in you. If you don't want to eavesdrop on a conversation, his eyes may become several shades darker.
A boy who is interested in you will likely try to make frequent eye contact. He will look into your eyes while you are speaking, and you may catch him looking at you from across the room.