So a friend of mine who's a lil' on the freaky side actually started hititng on me a month or so ago. I thought it was all jokes. We'd joke over IMs about it. Well then we were hanging out with some of her friends and she was groping my boobs and hugging me and kissing my neck. Later on before we left, she kissed me full on. But it seemed all joking/in fun. However now she's talking about doing more. Some things in the past she's talked about doing we've never actually done. I dunno if she's shy or not really bisexual but was just having fun. I really like this girl and I want to do stuff with her, if she's into it. How can I bring about the topic in a non-awkward way? How can I tell if she is serious?