Interesting. I wonder if friendships that leave you bitter when they end do not have some semblance of romance at their core.
Vikram, a really interesting question!
Vikram, a Zen meditation teacher once pointed out to me that love and hate are the same exact attachment, it's just that love is the positive attachment while hate is the negative attachment. I thought that made a lot of sense. Thus I've often observed that the opposite of love is not hate, the way most people think it is. The opposite of love is indifference. It does seem true that when there's bitterness present after a breakup then there was indeed a deeper attachment there. We don't feel betrayed if there was nothing be have been betrayed.