Well Happy B'day Guy!
Don't dwell on his age too much
Toys in general live longer than most dogs
If he's made it this far without many health issues he probably will
go on for many more
Enjoy him while he's here
No, he won't last forever but just remember that it's our job
to make their lives as fun filled and pain free as possible
I had a dog last a full 18 years
and up until the last year he really Never had a serious health issue