This is very interesting as it reads exactly like a synopsis for a zombie action movie. Killing zombies, then you realize your getting overrun so you have to retreat. You initially decide to you'd rather go and hang out with a big star instead of people you know then realize they are more important. That is the character arc, realizing what is truly important instead of what you thought was.

Then near the end your stuck all alone with what appears to be no hope. You see that in action movies, at some point it looks like the hero can't win then somehow she does.

So the end where your stuck all alone with seemingly no hope and your family leaving without you could be interpreted as you have anxiety about those things. Or part of you wishes you could be in a big adventure like in movies, like you wish your life was more exciting. Dreams cannot go on forever, at some point you'll go out of the dream cycle whether the story wants to or not. Sounds like the dream went on for a long time already.

Most likely a combination of the two as is it a coincidence that you ended right at that point instead of a few minutes later or earlier? Often what happens right at the end of a dream is the message subconscious is trying to give.

You also have the part where your initially more interested in being with a star, celebrity, then realize family is more important. Again though character arc is part of action movies. Still likely something subconscious is saying as your subconscious chose that character realization instead of any other and for some action movies no character arcs exist.

Probably part of all 3.

Too bad the dream ended, was very looking forward to learning how you would get out of that situation.