I think a persons feelings are multifaceted. Hate, love, lust, passion, fear, anger, sorrow. and many other less strong emotions are at the end points with indifference in the center. The emotions are so dynamic and ever changing, I doubt they can be nailed down with black & white answers. A women, whom I care for (maybe love) and I had lunch a few weeks ago. I felt very close to her and cared for her more then I did the day before. This week I called to meet her and she couuldn’t get away because of work issues and I felt slighted and actually felt disappointed with her and it was no way her fault. My feelings changed for no apparent (real) reason.
I doubt if real love turns to real hate very quickly. Some exceptions, like Gov Eliot Spitzer’s wife maybe!