“没见过的朋友”用英文怎么说？

The friends I have nevery met before.

我的朋友，你没见过
friend of mine you've never met
自己的朋友没有见过？
笔友？ pen pal
网友？Internet friend, ICQ friend, IRC friend ...

The friend you never met.

unseen friend

A friend that I have never met before.

A friend who I've never met.