I have always tended to be a sentimental type in my relationships. I am almost a year into my break up right now and I am now in the anger stage because, to me at least, I tried so hard to address issues and fund mutually beneficial solutions for our relational happiness & my SO did not really try at all.
As a parting shot in my belongings she included special hand crafted items I had made over the years. It felt extremely hurtful as it was done solely to hurt me, when the compassionate thing to do was to either pack them away, or throw them out herself.
I was angry at first simply because of her pettiness, but I am trying to learn from it and read the red flags early on that we ignore at our own peril simply because we want them to like us.