Time travel will never be possible. After all, time is relative and a concept that humans have created, and time travel itself is a concept that humans have created to cope with the feelings that we wish we could go back and change something that has happened. From some perspectives, time travel could be incredibly dangerous because altering the past could alter the future in detrimental ways. From other perspectives, however, time travel would just create a loop- if someone goes back in time, it means they will go back in time in the future, and that they have gone back in time before, if that makes sense.
As far as going forward in time, I, for one, would never want to move forward because I would be missing out on things and speeding up my already short life. I would never want to skip any part of my life. Even the hard parts help to make me who I am.