This was a good read:
http://www.johnlennon.it/showcase_page_2.htm
I was 15 and remember sitting in my room after school the next day listening to the radio and they played Beatles songs all day/night and I locked my bedroom door as I didn't want my mom to see me crying. My older sister had the Plastic Ono album and I used to play that all the time and his words and music have had a very big influence on me since I was 12.