Struggling with my bunnies' death.

I know this is a bit morbid and I apologise. But I'm struggling a bit. How do people accept the thought that one day their bunnies will pass? I tend to overthink a lot and this possibly be one of those cases but lately I have been so upset and in tears knowing that my babies will one day wither away and die. It's heartbreaking. Am I alone in this or is this normal? I will add though it isn't only my bunnies I get upset about but I know their lifespan is a lot shorter than humans so I'm more concerned about them. I love them so much and I'd hate for anything to happen to them

I can only that enjoy them well you have them and i do wish they had much longer lifespans but they don't so enjoy the best you can with them. in all i had 3 rabbit. one them has passed and though she pass in 2016 from unknown cause and was very young ( only 1.5 years ) . when they do go they will still be here but in our hearts. i hope this helps a little

Sorry for only replying now. Thank you for your response. I'm sorry about your buns passing. I've dealt with a few passing (I foster and rescue) And although they are just babies and I only had them for a couple days, I still cry my eyes out if one happens to pass