Yes, my dear self, I absolutely agree with you. Time does not exist. We only use it to organize our routines and activities we do in our life. It's manmade. If you will be more attentive and observe the world and the universe, time does not exist. It is dependent on the current place you are in.
If you are in a black hole, time and space switch place. If here on earth you can move in 3d space and can only move one direction in time which is forward, in a black hole you can move only on one direction in space but can move backward and forward in time.
There is already a future and a past and we are just yet to experience it. Everything is happening at the same time. Right now that you are reading this, the future is happening on another timeline and so is the past. Everything is just like a loop. If you move as fast as light, you can go to the future. If you can move faster than light, you can travel to the past.