How important is Facebook?

Yesterday I was doing a little grocery shopping like normal people do on a Saturday morning. As I was walking down the frozen section I hear some one calling my name. I look up from the assortment of "healthy" meals to see my old high school study buddy, Rachael, waving her arms in psychotic motions. We start talking to each other about family and other small talk. Somehow we ended up talking about a picture on Facebook. Now I have a Facebook but I don't check it 24/7 like she does. For about ten minutes she went on a rant about me and how I'm never on Facebook. She argued its the only way to stay in contact with people. I looked at her and told her, "I have a cell phone Rachael, if you want to talk to me call or txt me. That's the fastest way to get in contact with me." Is it just me or are people relying on Facebook way to much? I am way to be busy to sit on the computer every day just to make small talk! If you want to catch up on life call me or better yet lets meet and we can really sit down and have a face to face conversation. Why are people so caught up in Facebook? I don't get it!!