First off, I think everyone deals with this at some point. I think, also, since you are always changing as a person, what helps you cope at one point of your life might not work as life goes on. Various things have all contributed, in some way or another, to helping me in the past and present. Most recently, I came across a VSauce video from a year ago:

"Do Chairs Exist?" by VSauce [1].

Now, the thrust of the video deals with mereology [2]. However, the final line from Michael at the end surprised me a lot, and in the days since watching it, has been an extremely strong comfort for me:

"I am not a thing that dies and becomes scattered, I AM death and I AM the scattering."

I think it is worth spending the 40 minutes to watch the whole thing, as makes this line make more sense and extremely impactful. Anyway, this helped me recently, maybe it can help someone else :)

[1]: https://www.youtube.com/watch?v=fXW-QjBsruE [2]: https://plato.stanford.edu/Archives/sum2005/entries/mereolog...