My friend said she just stop suddenly comin to playstation and haven't seen her
If your friend is not accessing Playstation or any related medium, then I do not think we can help. Are you sure there is no other way to contact? Have you re-tried any previous methods?
It be appreciated if you have friends of friends that they may know about her to
What games or features does your friend uses? Some friends that may play or use anything related may help. But it seems a bit unlikely. There are many, many PSN users.