If you were in a hypothetical scenario where you are perfectly still in the middle of space with no gravitational force acting upon you, it's important to note that you would still age. Time dilation is not solely dependent on motion or gravitational forces; it also occurs due to relative velocity.
In this scenario, although you may not be moving through space, you are still experiencing time passing. You would age at a normal rate according to your own reference frame.
However, it's worth mentioning that if there are other objects or observers in motion relative to you, time dilation would still occur when comparing their experiences of time to yours. If you were to observe objects moving past you at high speeds, you would perceive time passing more slowly for those objects compared to your own experience of time.
Time dilation is a consequence of the theory of relativity and is influenced by relative motion and gravitational fields. So, even if you are stationary in space with no external forces acting upon you, time would continue to flow for you, but it would appear differently for other objects or observers in motion relative to you.