Because I am a man, I know more about men's psychology. Once a man is interested in a girl, he always looks into his eyes when talking to him. If a girl feels a little shy and blushes for it, it shows that they love each other tacitly. After all, this is the beginning of love, and there will be performance between men and women. Basically, girls will run away at this time because they are embarrassed to look at each other.
I remember when I was in college, a classmate in our class liked a girl sitting behind him, so she often turned around and accosted each other. Whenever she speaks, she looks each other in the eye. At first, the girls felt embarrassed, just silently bowed their heads, but over time, they got used to looking at each other, so when the boys confessed to each other, the other party readily agreed, because they were already together.
So when a man talks to you, look into your eyes, and he must have an idea about you in his heart, depending on whether you will find it yourself.