[header] How to not act like an idiot around your crush [title] Just breathe. [step] When you see your crush and start feeling excited and nervous, focus on your breathing. Remember that your lungs get less oxygen when you take quick, short breaths, which makes your heart speed up and your body tense up. 
So make a point of taking deep, long breaths to calm both your body and mind. [substeps] Inhale through your nose and exhale through your mouth.