Technically, if you're in a relationship and you have another romantic/sexual relationship with another person, that's cheating. Be it in real life or in the online world. So cybersex is considered for that matter.

But as for friendships, I don't think so. The responsibility is really on the committed person, whether she/he will let the friendship go on to the next level or not. For safety and healthy relationship, I think people should tell their partners of their close friends in general, in real life and online.

I do have real life friends and online friends. I have met four of my closest friends online ;] My exbf had a trouble with me having online friendships because he's not an Internet person AT ALL, but for as long as it's only friendship, I don't think it's wrong.

<font color="purple">Clandestine</font>