Yeah, I feel that way, too. Our "story" has a chapter in it that should not be there. I try not to hate the ow, I try not to hate anyone, but I won't give her (ow) capital letters.
And there are still certain things that are triggers. Like when he gives me a gift, I sometimes flash back to when I found the receipt for a necklace he gave to her. Or a song I cried to comes on, and I remember all the time I spent crying over him.