... love can so easily and quickly turn to hatred or hostility when the powerfully positive thought that brought it forth vanishes and is replaced by fear, disappointment, dismissal, avoidance, blame, rejection.

LH, I think these problems arise when sexual attraction/excitement/infatuation/romance - and most importantly, the unhealthy mental/emotional attachments produced from these - are mistaken for "love".

Relationships based only on these are doomed to fail - see the 50-60% divorce rates in Western countries.   Everything in Nature changes; relationships evolve and go through cycles too. And when the inevitable begins to happen --- the rose-colored glasses come off,                                                                                                                                                                                                                                                                                                                                                                                                                      hormone levels drop back to normal, the kids are screaming, the creditors are pounding at the door, and you find yourself hiding underneath that big ole pile of smelly t-shirts on the laundry room floor to get away from it all, well ... so much for "love".

Western style, anyway.