Do you think time travel is possible?

In order to travel forward in time you would need to travel at speed of light; say you were in a train going at that speed for a week you would of traveled 100 years. In order to go back in time you would need to jumped across the universe to the point before light arrives, to do that would require a worm hole but once again not possible. In physics nothing can travel faster then the speed of light and nothing can come close to its speed.