This may sound cheesy, but Mystery's Kiss Gambit is perfect for someone in your position, simply ask:
"Do you want to kiss me?"
Now, depending on her answers
"I don't know/maybe" You say "Lets find out, come here"
"Not Here" You Say "I understand"
"No" You say "I didn't say you could, you look like you have something on your mind"
"Yes" do you need me to tell you what to do?
btw, have you ever kissed before? The first one will always be hard due to the anxiety of getting it right, but theres no true right way to do it
I should add that this is how I have done it, and still do, I like it, you'd be suprised of the fact that I've never had a No with it, everything sounds good though.