why did he laugh at my joke if were not talking? Options

[cloudcandy]

for those who already know my situation,this is just an update from what happened last time.i like my guy friend i decided that i was gonna tell him how i feel, so i told him that i needed to talk to him but he didn't want to go somewhere quiet to talk so i didn't end up telling him but ever since that day, he stopped talking to me, so my friend asked him "why is it that you don't talk to ******* anymore?" she said that he was hesitant, he didn't really give her a reason so when she told me this, i asked her "how did he seem while you were talking to him?" and she said: "if he was any lighter, he would blush" then today i was telling this girl a joke and he was sitting right there then he just burst out laughing...why did he laugh if he were not talking? another thing, should i tell him how i feel still? there's 2 weeks left of school