Being trapped in a dream usually symbolizes that you feel you are not free to be yourself and your desire to free yourself from whatever is holding you back. It may be a relationship, career, old habits, health, money or any such aspect of life.
If you are tied with ropes or cables in the dream, they symbolize relationships that are holding you back. Analyze your relationships in your awake life. Who is that person or thing that is restraining your freedom of expression. It could also mean your addiction to something in life that you know is bad for you and and you feel trapped by it.
This dream sometimes refers to your feeling of helplessness on certain aspects in your life where you know you have the potential to make a difference and yet are bound by the conditions that stop you from doing what you want to do.
Another context of this dream would generally appear that you have a taken up more than you can handle and are not able to do justice to any of them. Your subconscious is directing you to remove the self-obligations to some of the jobs that are unnecessary or ones you dislike doing.
Seeing yourself trapped and no one around you implies that you are cut off from everyone in your awake life. It may also mean everyone related to you or someone very important to you is ignoring you or wants to break up ties with you.