life has a way of taking u by surprise.
chris daughtry says it quite well, "the day i thought i'd never get through, i got over you". and on the other hand when u thought u've forgotten, when u thought something's out of sight enough to be totally out of mind, something brings it up from the unconscious to the subconscious, and before u know it it's full blown consciousness. and u realise that the memory's still there.. and so are all the emotions attached to it.
life has a way of screwing u up.