What should we do next? I'd better let an experienced girl in. The day before yesterday, I texted her and she refused. Today, I chatted with her on her mobile phone again. ...

I guess your sudden confession scared those girls. People want to go out and leave a good impression on you. You keep chasing. Don't be too eager to get any answers, and then go to various places together. Now that she knows that you are interested in her, the meaning of your courtship is different from before. Move her slowly.