well ik that a certain guy likes me bc my friends were joking around with him about me and he was turning bright red but he will try to be funny around you as for you starting a conversation just try to get to know him

^hope that helped

don't worry I in the same situation

just go up and ask if he has feelings for you and tell him how you feel and just act like you are talking to a friend if it makes you any better practice in the mirror