Would a guy blush and smile at a girl for no reason?
One time I and my friend called my crush by his name. At first we thought he didn't hear because he did not even look back and he kept on walking so we stopped and stood for a while. After that when he was going up the stairs, he looked at me and he smiled(flashing his teeth) then I also saw his face became red. To my surprise, I immediately turn back without giving a smile in return because I was startled by his reaction XD *I don't think he is the pla