Yes. The inherent slaughter of my homeworld and my people to try and rid the world of Daleks did this. I used to be bitter. Now it's just a part of me, like the very cells that make up my body.
She was...the opposite of me. She cared. More for me than herself. I don't think she knew a lot of things that went on in my mind sometimes, but she always just cared no matter what.
She died before I had the chance to say a number of things to her.