This isn't an online affair, right?

My boyfriend of 4 years knows that I chat online with my guy friend who has a girlfriend. I usually tell my boyfriend about most of our conversations... but there are just some stuff I confide in to my friend that I rather keep private from my boyfriend. Mostly because I venting about my boyfriend. hahaha

Anyways, mutual friends of ours have been noticing we've been online more than usual on a social networking websites and raising suspicion. (It's true, every time we see one another online we start chatting. Usually, he initiates the conversations.) I assure them we're just friends for years so we're chatty. A few would say something like, "But you, guys, weren't that close of friends as you are now." (Yes, we hardly spoke a few years back and just saw each other at parties. Today, we chat about 3 times a week and only see each other at parties. Parties= 7 times a year for our friend's b-days.).

All it is, is harmless bantering back and forth, well wishes, and updates on life in general and its effects when we chat. We usually make each other laugh which is why I enjoy chatting with him. To me it's friendly conversation, to my one particular friend who planted the seed- it's a start of a bad direction into affair.

So, I would like to know what the general public think of this situation. Does this seem like regular friendly conversation or a start of an online affair?

(I would not like to thank my friend for implanting the online affair seed into my head. Which now made me paranoid of chatting to my guy friend on that particular site. A sarcastic~ Thank you.)