Women who chase men are generally unreliable. The highest state of love is that you like him but you don't show it. You have been getting along slowly, intentionally or unintentionally, let him like you first, or you can passively like it, so that you are happy and he is happy (because for boys, you need to cherish it hard before you can cheer). As for how to know, there are too many ways. A friend of a friend is your friend, and you can also meet at some activities.