Does she actually like me?

I've known her for a couple of years, but i feel as our friendship is something more than what it maybe. Lately when we have been out, she has been really flirty, hugging, keeping bodies close kissing (not lips), and from then i've had a crush on her, having ual fantasise about her and etc, and i knew shelikd me back - it was like this connection thing. A few days later, one of my freinds stupidly asked her straight out do u like him (looking at me), and she starts laughing hysterically, it wasnt really that funny at all. (and i know from my studies that when somone laughs like that after a question, and they want to lie they end up laughing like that, the she said no. Bt whats really making me confused is that why would she act really flirty, and start hugging, kissing me, and then deny liking me by laughing hysterically, i dont know, i feel like an idiot even putting this out, but i don't know anymore. Im a 16 year old male too.