Not necessarily paint them black, but you grew distant, cold and hostile towards them out of the blue. Whether it be a relationship, friendship, family member, etc. Do you miss them and want to talk to them again? And do you actually talk to them again?

If your ex-gf/bf/friend, etc. cancels a plan to see you after you went silent on them for a week, how would you react? Would you forgive them? Would you try to re-plan?

If you reach out to them after days of ignoring them and then you cut the conversation short, basically saying "well, I'll let you go, hope alls well" and they respond with "thanks you too" and you end the conversation with "yup," or "thanks," (you had the last word) and they don't reach back out to you, would you reach back out or wait for them since you had the last message? If they reach out to you after another week of your silence, would you feel bothered or relieved? 

I understand that this is all situation based, but let's keep it simple as in you just grew cold and distant towards them for no reason.