Leaving a note for friends

[Lazy]

Existence has been getting much worse lately and so I'm starting to passively prepare for ctb, not really a set date or anything, I just want to have the option at hand. So I am currently considering on whether I should leave a note for my closest friends or not. FYI its a small group of 2-4 people to whom I have several times talked about my suicidal tendencies, of which one is even suicidal themselves (thus I'm not going into detail, since they might be here as well). I just want them to know that they did everything they could for me and how much I enjoyed our time together, also it feels like giving them at least a bit of closure would be nice. Also I'm considering to leave them one note for them all in our group chat, instead of separate ones, just because we've always discussing issues together in there and it feels more appropriate that way. My main concern is that it will do more harm than good and I don't want that under any circumstance.
I know the final decision is mine, I'm just asking for your thoughts and advice on the matter since its been weighing down on me for quite a while but I can't really discuss it with anyone either.