Please can you give me some guidance?

Okay so I went on three dates with this girl, she’s amazing we get a long like a house on fire, she always intimates text contact and when we make a date she’s never flaked. So we went to the cinema yesterday, and we spoke for a while before the movie started (we arrived a lot earlier) she shaped me these messages from some guy and said she needs my advice on how to wriggle out of not seeing him, I told her to make an excuse and left it at that. She insisted I read the messages too, and they were just horrible blunt replies from her part to him and she said something like “see I never message you like that” of course me ego is now sky high because there’s beautiful creature shows me a lot more attention. Anyway the movie starts and we watch it and she’s moving a little closer and for the first time we hold hands, then cuddle (put my arm around her, couldn’t cuddle properly due to arm rest) about 20mins passed and she resting her head on my shoulder, I thought to myself I’ll try kiss her now and gently touched her chin and directed it to look at me. I went in for the kiss and she said “no no” and rejected my kiss. I laughed it off and just continued to change conversation. Went to dinner afterward and didn’t speak about it. I don’t understand an I being lead on? She never asks me to pay for stuff so it’s not money or I’m being used for that. She did mention she’s never had a boyfriend before. Could it be nerves. How’d I approach this?