Any advice????:'(? I need help-.-?

You see I'm a former esl student(English as a second language) and this semester I moved to a regular English class..and today we have to debate...I'm not good at speaking infront of people ..and I screwed it ...I stuttered and my English is messy it's like no one can understand me..even my crush laughed at me???any advice and also how can I forget this incident?