What does it mean if a boy fidgets or moves a lot when he's talking to you ?

i was talking to my friend who's a boy that I like, and he was moving a lot! he had a bottle in his hand and he kept moving it from hand to hand? he also was just fidgeting and all that ? oh and he called me a stu which means like a nerd kinda :o and I just shrugged my shoulders and then he said I wouldn't mind being a stu ? what does all this mean ? :P please and thank you (:
What does it mean if a boy fidgets or moves a lot when he's talking to you ?
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