People change about every ten years...... so the person you meet today or marry will not be the same person in 20 to 40 years.
life and regrets
Being in a relationship with someone will change a person.
Have you considered they might have a form of personality disorder? I know someone, or knew someone, who would wake up with a totally different set of feelings than he had before he slept.
Quite a few things.<br />
Extremities of life, love, person's own will/ temperament or rather lack of it, etc.
love can change someone and just getting older and wiser
..."only traumatic memories in repression can cause the neurosis."
We change all the time,through experiences,thoughts good or bad.The thing is we don't see change coming,one day you wake and bang change.
Unexpected inflow of money is the many reason for such causeless change.
the reason may not be obvious to us, for the change keeps happening as we evolve. What we don't realise that we too change... <br />
But its felt all of a sudden, when we meet after a long back, where our memory has the old image of the person. Like how planets have a retrograde, and earth too has its retrograde.
experiences change people. And decisions change people. there is usually a reason for both, even if you don't know what it is. you would probably have to ask them.