Does everything have an ending?

Everything ends somewhere. A book has an ending, a song stops after a few minutes and the earth stops where the universe begins. But where does the universe end? How far can you go through the universe without anything stopping you? Or is there maybe even something bigger than the universe. Is the universe a very small part of something else, like earth is a very small part of the universe? Does the universe ever end?

Also, they have said many times that the world would end, but it never happend. Now they say the world will end in 2012 and I wonder if it's true. Can 2012 really be the ending of life? Can 2012 really be the ending of pretty much everything that exists? Like a book can end on page 428? Like a song ends after 3 minutes and 48 seconds?
And what about the word 'forever'. What does that mean? Does 'forever' have an end? If you say that you love someone forever. When does that love for the person end? I mean, it must be ending somewhere, right? If you love someone forever, is forever over when you die? Or is there still the spirit that carries the love for that person? If you love someone forever, does that really mean forever, without an ending?

So now I wonder.. Do things that have absolutely no end whatsoever exist? Or does everything end somewhere, sometime?