The relationship moves very quickly and it feels like you have met "the one." Months down the road when things have settled in comfortably, things start to change.
This can actually be the most hurtful part because it may make you feel like they never cared about you at all.
Perhaps as time goes on, the person who you thought cared so much becomes more emotionally unavailable, distant and cruel.
The "Jekyll" part of the personality starts to overtake the "Hyde." How did this person who used to be so wonderful and made such an effort to be with you all of the sudden turn out to be so opposite than what you thought?
Usually it takes a certain amount of time to fall in love with someone.
Sure, you can feel chemistry and a connection with someone but to fall in love with who a person truly is (flaws and all) takes some time.