Yes, what slowinmi said :-) I've noticed too that not all people one enjoys at work are as good at chat online as others. I know that working with some people all day and then chatting with them at night; it's just too much. A lot of my friends I use to chat with had more friends than I did too and I think it can be hard when you have 20 online friends talking to you at once and easier to let a few you see day-to-day just drop a bit since you can talk to them during the day, especially if you or your friend don't have much to say at night.