Boys always look at girls, sometimes with a smile, trying to touch girls. Why?

Like him, it's as simple as that, which means that this boy intends to express his thoughts to you, but I don't know if he really likes it. When you fall in love with someone else, you must know the character and essence of this person. Don't let this man be unreliable. Finally, you will be sad. I have a suitor who says he likes me. I'm not sure whether he likes me or not, so I don't know what to do. He just talks, but he doesn't express much. Alas, is this person so careless in chasing people now?