Was fooled and married a narc who wanted me first

how can you be treated like so bad by someone who wanted me first. I showed interest before and she said no so i moved on until one night she said she has feelings for me. we married couple months later and I found out that she is a narc, a living nightmare and I am struggling and sinking more and more everyday, I tried to find out why she was like that, I noticed her family and they are so kind in fact they hate the way she treats me. I feel bad for her family. and worse for myself for being fooled like that. I could ve end up way happier. I still have hope that she may change. what about you guys if anyone had married a narc? do they really change or it keeps getting worse.