>>383247853
Depending on how you secretly hated them then proceed with caution.
If you hated them because they objectively hurt you then keep your guard up and stay at a distance. Doubly so if they never showed remourse.
If you hated them because you interpreted something they've done as bad. Then accept that you may have been wrong and let go of the hate but still be a bit cautious. The feelings and gut reactions have value too.