...but if you aren't family and you aren't a close friend, it's not my responsibility to sacrifice my own emotional well-being in order to facilitate yours. (It may not be my responsibility in those other cases, either; but those waters are murkier, and I'm unwilling to claim that it's never the case.) Regardless of who expects me to, it's not my responsibility to make conciliatory gestures when I don't want to reconcile a relationship.
And why am I blogging this? (Worse! Why am I vagueblogging?!?) Because I feel incredibly stupid for not having recognized sooner that I have the right to trust my own judgment about people and how to handle my interactions with them, that I don't need anyone else to validate the morality of my decision to value my own feelings over that of someone who has violated my boundaries, and that it's totally within my right to determine where those boundaries lie.
And it feels freaking awesome to own all of that.