Memorial tattoo in Chiang Mai

Hello all, I hope someone can help me.

A close friend died last week and it's been a pretty rough week trying to organise everything, notify people and liaise with his parents (who live at the other end of the UK).

And then it was time to come on my honeymoon 🫠 (terrible timing). I've had to leave my other friend to carry on without me and I'm now in Chiang Mai trying (and mostly succeeding. We've only just arrived) to have a nice time with my husband, who is very understanding.

I feel guilty for leaving my friend to do everything, guilty for coming on the trip, guilty for trying to have a good time and for actually having a good time. And I've been wondering what I can do to just make it all a bit more bearable and I thought it might be nice to get a tattoo in his memory. I'd like something in Thai that says something about death. I was thinking 'nothing lasts forever' or similar but I was wondering if there were any Thai expressions about death or something similar to 'memento mori'. Something to remind me of the passage of time, to remind me of my friend and to live. If anyone can help me with a translation or a uniquely Thai saying, I would be very grateful. I've done some googling and can't find anything exactly right.

Thanks if you read this far.