Girlfriend problems!!!!!!!!!!!?

Hi, i'm 14, and i recently asked a really beautiful girl out, she said yes, and she was blushing like crazy, twirling her hair. She's a popular girl who has had many girlfriends. Whenever we talk, we both get nervous. She starts twirling her hair, and blushing. I start being awkward. WHAT DO I DO!!! I really like her and I dont want to lose her. What are some good jokes I can tell her. Im known for being corny, funny, and sweet, but when I'm around her I get nervous. AAAAAAAAAH!!!!!