What should I do in this situation?

I really like this girl,but I don't know what to know. I've known her for almost 2 years,and we're really close friends. Yesterday, I was over at her house and she held my hand and wouldn't let go, and I just laughed it off. Then we were getting playful ( not in a seductive way) and I was biting her. Then she told me to give her a hickey, soooo I did. I don't know if she likes me or not. ahh -.-