How to give a guy ur number?!?!?

ok well theres this guy and hes real queit and he doesnt tlk much and hes not very popualr but not a nerd. well i personally think hes super cute and today at picture day we sat together on the bleachers and we just kept talking and when i looked away he was still staring at me. also he grabbed my hand on the bleachers and made it look like an accident. his lil bro is like my bff so im aorund him all lunch and recess. so i was wondering how do i give him my fone #?im pretty shy and queit too exceptaroud my friends but im terrified of other teenagers and crowds. so im pretty scared to give guys my #. can you give me some discreet ways to give it to him?? im not very confident. so im most certainly not going to just walk up to him and give him a piece of paper wit my number. so any suggestions??? plzzz help FIRST best ansewr 10 points!!!