I think that the online world tends to cope better with happiness than sadness. This is a generalisation of course, and generalisations are usually wrong. That said people will rally round on your Facebook page during times of trial, so perhaps it depends more on the nature of your happiness or sadness. The same is true of the church. Loneliness or depression, for instance, do not tend to attract as much sympathy as something involving an impressive bandage.
The causes of online absences are notoriously difficult to diagnose. It could be that your friend who has not been seen on Twitter for a week is desperately unhappy, or it could just be that they have forgotten their password or that the wire has come out of the back of their computer. Sadly the likelihood is that few people will notice, as there is always someone else posting something interesting.
They could, of course, have realised that nothing beats face to face contact with an actual human being who is in the same room. But that said, some of these people could have been ones they met through a shared interest in being on the internet.
What I’m trying to say, in essence, is that the world of online computing is both terribly good and terribly bad. I realise that this is not a clear and coherent statement of belief, which is why I have never been asked to play any significant role in devising creeds for any of the world religions.