Arm pit problems!!! helpp =(?

well in cl today i was sittin with my friends and i was realy hott and i had a sweater on and the boy i like was rite infront of us and he was talkin to us and i lifted up my arms cuz i was fixin my hair an his friend said eww ur wet under ur arm im like wthand idk i was paronoid im like its deodariant i do use deodariant but my friends were laughin at me and the kid i like was like shes sweatinggg and gave a gross face im like paronoid now =( help any adivice??