Last year and early this year me and this girl?

Used to talk for hours about five to ten hours and then I asked her out when she had a boyfriend and she said no so we argued and then after we stop arguing and I asked her out again and it was the same answer and then she said she loved me and wanted to see me down her house soon so then I asked her out again and the answer was the same then we huged and sat together when we were alone at her house but then the night after she had a argument with her dad and sister so she went out of her house crying so then when I went to bed in her other sisters house I could not sleep so i went down to get a drink about five times and finally she said sit down and watch tv with me please and I said ok and we talk and watched tv together and she lied down and put her feet on me and then she started playing with her hair and smiling at me so then I smiled back at her and then the next morning we did not talk very much so then when I went home to my house we talked online at then at the end of our talking she said right I'm off to bed XXXXXXX and I said ok bye XXXXXXX and then she said XXXXXXXX and then every morning then I woke up with a smile on my face then when I went up to her house again I dated her best friend and things started to get bader and bader between me and her so now I ask her out and she's not answering to why please help and answer!