You have a personal relationship with God because there is no difference between the two. That is basic Advaita.
The sort of god that exists in popular religion cannot exist in any serious philosophical model. Aristotle has no room for anything which cannot be precisely described, and Plato’s realm of forms allows no change of state. Just perception of what might exist there.
See Plotinus’s Three Primary Hypostases for a good model, which was eventually lifted by the Christians in Rome to form the basis of the Trinity.