"A girl can tell I like her when I blush or start telling bad jokes"

In this quote, Zac Efron is explaining how he reveals his sensations towards a lady he likes. He explains that when he is around a woman he likes, he tends to blush or inform bad jokes. This suggests that he ends up being worried and attempts to make the girl laugh in order to impress her. Blushing is frequently a sign of shame or shyness, which might suggest that Zac is feeling susceptible and exposed around the woman he likes. By informing bad jokes, he may be trying to break the stress and make the lady feel more comfortable around him. Overall, this quote showcases the typical behaviors of someone who has a crush on someone else.