I think that online affairs are a lot more common than people admit to, but many don't feel that having an online affair is really ''cheating.'' To me, it is. On this forum, I've read quite a few threads where betrayed spouses were basically betrayed by their wayward spouses having online affairs. Nothing physical happened, but the BS still considered it to be cheating. It doesn't happen over night though, so if you are married or in a serious relationship and are spending a lot of time privately talking to people from the opposite sex whether it's on social media, forums, etc, be careful. That's how affairs start.
Thought this was worth sharing here. 9 Signs You are Having an Online Affair
''Sometimes, you fall in love with the most unexpected person, at the most unexpected time.'' - Unknown