If physical action causes reaction, doesn't mental action cause reaction too?

For example, Newton's third law is that if a body acts another body, so the other body reacts to the acting body. Now consider a mental action, for example one person who loves another person: that action doesn't always cause a reaction, the other person doesn't love a person who loves. Is not the law of action and reaction, of cause and effect, also true for mental actions as it is for physical actions?