is this love? to me was not about ayu having psychic powers (although that is a fun idea to have in mind when you watch the video)
We see Ayu very sad throughout the whole video... and she supposedly sees the future... well the song talks about, I think, is someone finding out that their love doesn't love them back in return...
When you lose a love like that suddenly you can feel like your whole world is crashing down on you... I think that Ayu is playing a part of a heartbroken woman... and she pictures her world crashing down upon her...
Then we see a boy get hit by a car... and I believe that symbolizes that we feel like our world will end when we lose someone we thought we couldn't live without... but then Ayu see that everything is okay and that the boy doesn't get hit... and that symbolises that she is going to be okay, and that her hurt will pass...
Then it shows her apartment, like none of the stuff (exploding fish tanks and apples) ever happened... And that symbolises the beginning of healing...
That's what I got when I watched it... the video can seem very boring if you don't really read into everything... but once I got it, It really is a sad and beautiful PV
EDIT: Just read dark's explanation- Yeah, forgot about the title... She can't believe that the feeling of a great love can turn into such a heartbreak... and that love can hurt very badly