How does a girl touch you?

This girl that I like a lot is always touching or trying ot get close to. Is it ok to to touch her back and will she like that. Also can I tease her and make her wet by doing that. Because after she touches usally on my leg I will touch her back and leve my leg touchuing hers. Then she rubs my leg or touches me back. then I start to do the same thing which makes me really horny and I start to get really hrad. Is that ok and if I get hard will she notice if I have a bonner. Will she like that or get crept out about it. But If she did she that I got hard I dont htink she mind because she did not move away from but instead start to rub her leg on me even more and got even closer to me and put her leg alomst on top of my. So I am pretty sure she liked it a lot because she could not stop staring at me and touching me. She also start to bite down on her lips and also lick her lips which turns me on even more. So I was just wandering if I was reading her signals and geting them right so if you known the answer please answer me back asap thank you.