Like any addictive behaviour, this can result in feelings of self-loathing and feelings of inadequacy.  Addiction has a destructive impact upon a relationship.

The internet has led to an increase in availability of pornographic material and opportunity to meet and embark on internet affairs with very few constraints. 
If you think you may have an addiction of this nature you will be listened to and helped to clarify for yourself the level of the problem and how to resolve it.

Difficulties that are held as a secret can build up out of all proportion in your mind, adding to the anxiety and leading to further increase in the unhelpful behaviour.