online friendship

Here it's possible meet people for every taste, from each country to improve any language, get some new experience, discover new cultures..

So, first you find someone for conversation. You're chatting one day, next day, week, month... exchanging your contacts in facebook, skype, hotmail etc.
You're already good friends, you both want to meet each other in own or friend's country, dreaming..
You share with friend about how was your day, what new happened in yours lives, relations, friends, family, mood, interests, sport, funny stories and many others.

Later you catch each other online less and less, but still try to make a nice chat and hope to talk more often. You miss friend (and who knows if it is mutually).

And one day you will know that friend deleted his/her account in a social network.. What will you do then?