I need help with my friendship/relationship problem. Can anybody help me?

Hey.
Long story short. I (m 25) have one friend (f older then me). I have been friends with her 4~ years. And I went to a concert with her. I was a photographer there. And when bands were changing. She did something weird. So I went and sit on a sofa and she sits on my lap facing me. I think she wanted to kiss me right there. And I said that, don't you want to sit better somehow. And then she sits normally on my lap and I was holding on to her/my but my arms around her. I mean, I like her. But because I don't have any other friends, that I hang out with. I didn't know what do to because I'm afraid of losing her as a friend if I read the signs wrong. And now i don't know what do to. Can anybody help me. Big thanks to the people that answer. And sorry for bad English, it's not my mother language.
I need help with my friendship/relationship problem. Can anybody help me?
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