Can you tell me is watching too much porn an addiction?

Pornography Addict?: That is difficult to say, without knowing how often you watch it, and for how long each time (or each day). "too much" really has to be defined first. Also, you should notice if it's causing you to isolate from others, if it's always on your mind, if it's interfering with dating/sexual relationships with others, and the like. Best to seek out professional help (counseling) to get help with it.