My condolences on your loss

yeah few yrs back i was an online presence to a friend dying she had an incurable condition and had decided it was to painful asked about 20 of us to be there and chat with her and her twin sis until the end afterwards i downed a bottle of rum and cried for hours hope your doing as well as can be expected at this horrible time

Yes, it’s happened twice to me. It’s amazing the connection you can build with an online friendship. It’s definitely a feeling of shock, loss and grief, but perhaps not the panic stricken, long term grief that you feel with real world friendships or family.
There is one woman I still leave posts for. She was amazing, and a real activist for literary and young people. You won’t forget them, you might cry and miss them, especially if you spoke daily and gave each other joy. it’s beautiful that we can have connections like that. Online friends really can change your world and even our minds.
I like this. I read it at my mum’s funeral. I find it humanist, as we all go back to nature in some way. I think your friend may have liked it:

Do not stand at my grave and weep
I am not there. I do not sleep.
I am a thousand winds that blow.
I am the diamond glints on snow.
I am the sunlight on ripened grain.
I am the gentle autumn rain.
When you awaken in the morning's hush
I am the swift uplifting rush
Of quiet birds in circled flight.
I am the soft stars that shine at night.
Do not stand at my grave and cry;
I am not there. I did not die.

by Mary Elizabeth Frye

I'm sorry . That is very sad.