quote AHB
Often the outward, physical signs can be faked, Tabba. It is amazing how many stories of broken relationships revolve around people having no idea from their partner's or friend's behaviour that they didn't love them/love them any longer. Brain-chemistry around love is, I'm told, very similar to that involved in liking strongly - but not loving. Obviously, love/like compared to hate may well be obvious - though I'm told that strong emotions like love and hate are also remarkably similar in many ways.
Real love has a high level of oxytocin associated with it - and I would dispute that love and hate are similar in any way other than the level of intensity of those feelings. Hate is not a pure emotion - it seems to be underlined with fear. Cortisol is associated with hate and fear. We are creatures of our chemistry and I'm willing to bet that your interest in trains at 40 was because of the build up of a need for a focus for pleasure seeking and you found it in trains because something surrounding the culture of trains ticked all the boxes. It was the last place you looked, not that you found perfection. Had it not been satisfying, the search would have gone on. As it does with me. Crochet just doesn't cut it.