I sent a message to a girl, and she didn't reply or refuse me. What is the reason?

There are three possibilities. One is that I was too busy to hear, so I didn't answer. As a girl, I am more reserved. Since I didn't return at that time, I will definitely not return in the future. The second is to test you to see if you really want to chase her and see if you have enough patience and determination. The third is that I don't feel anything, but because I don't want to refuse you directly, I simply let you give up by ignoring you. However, I advise you to observe more and pay more attention. There is a process of chasing girls. A watched pot never boils. Take your time. A text message proves nothing. Wish you success!