Having survived a few suicide attempts I've been convinced this is how it actually is. I have no interest in any further attempts because I know I'll just end up waking up full of regret and possibly maimed.
I don't feel like this is exactly right but it's hitting some of the same notes. Divided by Infinity by Robert Charles Wilson
!The one I remember ends with the main character essentially becoming the singularity, but this ends a little differently. Equally as sad as I recall though.!<
In contrast, dying but finding that an infinite universe will almost certainly build your atoms back up again in the same configuration in an endless cycle without you knowing.. might be more plausible and therefore even scarier to me.