Sounds like my kind of dream, aliens and spaceships. I think with most dreams your role is central, even if it doesn't appear to be. They are there to sort things out in your head, so if it looks as if you aren't the center of attention it's done that way on purpose to help you realize something, the trick is finding out what.

Do you watch movies like this or play video games like this by the way? That might account for some of the scenery, but it doesn't change the meaning of course. I think it could be that you're worrying about something big that you feel is looming in the future, but your dream is trying to tell you that although you might be worried or scared, it's going to turn out be not nearly so bad for you after all. That's one idea anyway, what do you think?