My crush sits behind me in maths! How do I catch his attention/or talk to him!;*?

Right!... I Have this Crush on this guy... And he sits behind me in my maths lessons... I don't know what to do.. I start shaking and then my heart starts to raise and i Start acting weird.. Im a very shy person i don't think i could start a conversation with him i would prefer him to start or even start flirting... I also think his best mate fancys me what do i do? Please help me what to do before tomrrow:(
My crush sits behind me in maths! How do I catch his attention/or talk to him!;*?
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