Why would a guy get loud when he knows you are near?

There is a guy i know has a crush on me he used to be shy and quiet. now he goes out of his way when he knows I am around like in another room, he gets loud talking and laughs loud. this just started is this to let me know he is there, because he sure knows when I am there, we are in the same hallway at school the classes are two rooms away, he knows my schedule. Like all is quiet I will be like in the classroom and he finds out I am there and will be super loud outside the door and laugh and carry on? He also does dumb stuff like watching me in the car when he is in front in traffic then swerves last minute with no signal, I think its for attention but, I dont know , its silly but we are both 17

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i am female i signed up on April fools day to gag and the pink color i chose wound up being male, i didn't know it at the time gag did that, try asking jeez
Why would a guy get loud when he knows you are near?
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