What if the girl doesn't answer the phone or reply to the text message?

She used to take you out shopping and have a perm with her every day. From then on, she took you as her boyfriend, but you didn't know it. It took you so long to say you love her, and she ignored you. That's her emotional revenge on you. If you like her and want to chase her, you should apologize to her first, and then have sex with her openly, which may be successful. In other words, if you don't do this, you are bound to fail.