She is only treating you as a friend and wants nothing more at the moment. If you confess now I think can declare good game instantly lar. Just be her friend at the moment and don't hope for more if not friend also cannot become.

Still thinking she is only treating the ts as a friend ler. If she likes you, she won't keep telling you about her bf. She will try to avoid your question. She is just enjoying the attention you are giving her

And I totally agree with what max_cavalera said. Most of the girls are like what he described.