I can't say for you what is best to do. That is YOURS to decide. Online friends are always questionable unless you know them irl but if not then will they really care and will you in the end? You will be gone. The answers anyone left behind wanting to know even knowing you as friend, lover, family or whatever will never be told or enough for them to understand themselves. Maybe the rl friends not online strangers who say they are your friends those will possibly want to know the real answer to that older than time itself question Why? . But if it is a note you think will help or email text etc etc then I give you a few examples here. These are from real people who successfully ctb. Or maybe you can just leave without anything said. Up to you to decide. Wish you the best journey and that you find eternal peace and happiness if ctb is to be.
"I am going to put myself to sleep now for a bit longer than usual. Call it Eternity"
―
Kosinski, Jerzy
"This is what I want so don't be sad."
―
Nina LaCour, Hold Still
"When I am dead, and over me bright April
Shakes out her rain drenched hair,
Tho you should lean above me broken hearted,
I shall not care.
For I shall have peace.
As leafey trees are peaceful
When rain bends down the bough.
And I shall be more silent and cold hearted
Than you are now"
―
Sara Teasdale
"Dear World, I am leaving because I am bored. I feel I have lived long enough. I am leaving you with your worries in this sweet cesspool. Good luck."
―
George Sanders
"When all usefulness is over, when one is assured of an unavoidable and imminent death, it is the simplest of human rights to choose a quick and easy death in place of a slow and horrible one."
―
Charlotte Perkins Gilman
Unknown: "Bury this body in the ground that I have suffered on."
Peace.