Don’t assume that you know the other person’s intentions. Too often, we infer their intentions. And we get it wrong. Those assumptions lead to frustration, blame and then resentment. “He left it behind because he doesn’t care how important it is to me.”
“She didn’t do what I asked because she really doesn’t care about me.” In most cases, they meant no harm and are indeed saddened to hear that you their words or actions hurt you.
You’d both be better off, if you both gave the benefit of doubt.