Chivalry: Dead or Alive?

Last year my history teacher called me chivalrous for walking my girlfriend to class every day, even though I was late to his class every day because of it. I walked my girlfriend to every class and his was the only one I was ever late to. I generally try to hold doors open for everyone and I even go to the other side of the car to open the door for my girlfriend. I try to be chivalrous even though most of the time no one seems to notice it.