English group lesson online (2)

The One's word provides group lesson dairy except Friday and Sunday. I often join the lesson. I feel comfortable when when the skill of students joined is almost same or higher than mine. Now I can say that some of the regular attendants are acquaintances or friends. However we know each other only through the Internet. The feeling is same as that I felt when I was in 'Second Life' as an avatar and got friends in the virtual world. I wonder if I should rethink the purpose of joining the group lesson.