Ive never met him in person?

okay, so im 16 & this cute guy messaged me off facebook & told me i was cute..hes gonna be a junior & me a sophmore..i know for a fact that hes real but im kinda nervous to meet him in person cus he wants ne to go to a bonfire with him..& all his friends are gonna be there..i need advice on what i should do..like if i should go or not & if i do go how should i act & dress that would be cute haha