First be yourself because other boys like girls that being theirselves just be normal whenever you bump into him and don't be so extra LIKE THIS:

"You're crush will go this way look" my bestfriend said while pointing at my crush "Please can we act normal just this once" i replied to my bestfriend "O K" my bestfriend said to me.

And this one please don't do this:

"Hey you're crush will go this way" my bestfriend said "uhm when he goes this way please pretend that you push me so he will catch me okay" i replied to my bestfriend "Ok i will" when my crush is in our front my bestfriend pushes me but no one catches me now im embarrassed.

that's why you shouldn't do that but sometimes it works only in novels

I tried that way in my crush and obviously he didn't catch me and his friends laugh at me even my classmates

If you're childish be childish but don't be too childish because he will ignore you don't be so extra when he's around cause he will just play with you based on my experience just be LIKE THIS:

"Hi baby want to play while you're mommy's away" i said to my nephew while were at mall of course my crush's there and he likes childs "Sure tita come let's play there" while pointing at the arcade "Okay baby let's go there" seems like this kid knows that i have a crush on his classmates brother huh good girl "Tita look that's my classmate let's play with them" while pulling me towards her classmate and my crush "hi can we join you?" my nephew said to her classmate "Hello sure that's fun" her classmate said "Oh hi you're here too" my crush said to me while wearing his cute smile "H-hello how are you" I said to my crush while blushing "I'm okay you how are you" my crush said to me "I'm okay too" while still blushing "I don't know that you have this kind of side too so cute" while pinching my cheeks Ahhh i can't "Thank you" while smiling and getting my face hot because of blushing

And this for the sake of god DON'T ever DO THIS:

"Hi you're here too" while mimicing a baby's voice "Uh Hello actually we're already going home hehe" while pulling his little brother "Oh okay see you" while mimicing again the baby's voice

see that's why you shouldn't try that he will LEAVE YOU

This one if you have a friend that's so loud it has advantage and disadvantage the advantage of having a friend that's so loud is you're crush will talk to you because she's so loud you know he will be annoyed by that friend so in order to stop your friend he will just talk to you and the disadvantaged is if he's close with you he will not talk to you anymore cause it will be an issue in your whole school and you're crush don't want an issue because he have so many problems so he dont want to get involved AGAIN in any of that and the other disadvantage is he will ignore you and think your obsessed with him and start to not pass by you and your friend because he thinks your obsessed with him so try to talk to your friend that don't be loud whenever he's there i said it in the first episode act normal