She the kiss stuff you talked about probably means she's ready to be kissed. Spending a dinner, a movie and going clubbing means you spent more than enough time with her that she should have been comfortable. I never spend that much time even with my best friends.
You, though, should make a move soon. She's waiting for you to gone in with confidence. When you think she wants to kiss you and, more importantly, when YOU feel it's time there are two routes to go.
You can do the Mystery/Style "Do you want to kiss me?" And if she says yes, kiss, if she says maybe, this means yes and say "let's find out
" and if she says no, say "I did not say you could it just looked like you had something on your mind."
From what I am hearing from you, this will be no good because it seems she has already made it clear she has feelings for you. While you were talking about the first kiss, her impression may have been "Hard?!?! Is it really hard to kiss me?"
I would say, for this situation, a real passionate, SPONTANEOUS, kiss would work well, since your conversations have taken some of the spontaneity out of the situation. Grab her by the neck and underneath each ear, say "I can't wait a second longer to do this." If she pulls her head back, kiss her on the forehead or the cheek, that way there has been no rejection and you do not look like you are forcing yourself on her. If she stays still or leans forward into you, go for the kiss on the lips, but make sure you are the one ending the kiss instead of her.
Then tell her, "before this goes any further, I wanted to make sure we are on the same page." This shows you have the expectation that it WILL go further and she should, too. Then say to her, "I am dating other people (if you are, always be honest.)" Or "I want to keep my options open. Do you mind that I see (or am interested) in other girls?" I have used this somewhere around 10 times, and have never had one girl say no. They all say yes.
If she does say "no," which I would imagine in some situations were the girl was more serious about the guy would be the case, this shows you that she is interested in being your girlfriend.
Say to her, after she says no and if you are interested in a relationship, "Do you talk to any of your ex boyfriends?" If she says yes, then tell her "Well, I have to keep my options open." Do not ask her to stop talking to her exe's, she will tell you she has once the validation you give her matters more than her exe's validation.
Good luck, it seems like you are on the right track.