They are my little homies... I would feel loss, but not something I would miss work over. That would be a weird thing to explain to my boss, eh?
It does hurt for a bit... because, if you are a good owner and have seen the wonders of these little guys, it hits you that, yes, they live a short time, and within that time they are able to learn so much, show love to you, show appreciation to the hand that feeds.
My wife just told me over my shoulder that the best way to deal is to get another, so there is a 2nd opinion to mine. Generally, you would have them in pairs or more, so, naturally, that may be a good thing, if your others are willing.
I would not be making youtube tributes... I am going to be blunt, if you want to know what I would do if I were you, I would grab your shovel, bury with dignity, and continue with life knowing that you shared a slice of yours with what was an ENTIRE life to them. In one way it is sad, but in another way, consider that you have the capacity to experience many lifetimes. We are human and aware of our finite role in the universe, but that doesn't mean we can't parse it out a bit to the lives of the misunderstood.
Think that you may experience enough in a short time to justify the loss. Think that the loss will happen with or without you, but don't let that keep you from having a pet rat. If you are prepared to take care of them properly, it is better that you have to go through it, than for them to land in the cage of someone that is not, or even the belly of a reptile.