I could go either way on this letter (
link here). It might have been written by a sociopath, or it may have not. But I always think it's an entertaining exercise to look at other people's communication in a critical way, trying to strip it of all your prejudices and preconceptions.
I think the letter is definitely manipulative. There is a certain lilt to it, a certain charm. There is a relatively good cadence, it is interesting to read. There's not really one point made, and though there is an apology, it's not for nothing specific. The apology, to the reader, could be interpreted as an apology for everything and anything that the reader believes the writer did wrong. This was clever, because the writer may truly be sorry for only one thing ("not behaving better") or may not even know what to be sorry for, so instead keeps things vague and lets the reader fill in the blanks. (Or perhaps doesn't feel any real guilt at all.)
I obviously don't know anything about the target of the letter, but I know it was effective because the reader has reunited with the writer. The letter seems clearly designed for one purpose, and that it accomplished that purpose leads me to believe that despite certain prejudices of mine about what I think people want or do not want to hear, this was obviously what the reader wanted to hear. The most interesting thing about it, though, is that although it is what the reader wanted to hear, the writer doesn't actually say much. Instead, the writer relies on the order, the structure, the format, the very cadence and rhythm of the words to lead to what were probably almost unavoidable logical inferences for the reader.
The writer hits hard with phrases like "I loved you" -- phrases that are sure to stand out in the reader's mind much more than the follow-up qualifiers of the love being selfish or narcissistic. The letter seems like an illusion, relying primarily on misdirection rather than outright deceit. The writer knows that he has to be honest, and has to come clean (so to speak) by actually including the various qualifiers and self-effacing statements he includes. That the reader wants to think he/she is reading honest responses is also apparent by the included phrase, "It's funny that after telling you virtually nothing, now I just want you to know the truth." We have talked before about how good lies typically contain a good deal of the truth, and the writer seems very careful about keeping the letter realistic (e.g., it sounds like these two did not know each other well enough for the reader to believe that the writer genuinely loved him/her, which is why the writer says "of course it was, I barely knew you"). The writer seems to be trying to reestablish a shared reality between the two of them, but a reality based primarily on rewritten history.
Going back to the phrase "I loved you," the past tense of the word loved is curious, but it seems purposeful, perhaps wanting to instill a sense of fear of loss or actual loss in the reader. Also it suggests that the writer is harmless, impotent -- because he/she no longer loves, he/she no longer has an incentive to "behave [poorly]". This seems designed to assuage any fears or misgivings the reader has about letting the writer back into his/her life, all while piquing the reader's interest --wanting the reader to not just think it is harmless to allow the writer back into his/her life, but actively wanting the writer back in his/her life.
The letter is also a Trojan horse, however. It promises love and eternal devotion, but those very promises are designed to guilt the reader into some sort of a response -- the writer's desired goal. The writer says, "It feels like you never really gave me a chance," followed by "I loved you." There are also the recriminations: "I feel like you have given me abandonment issues that I never really had before. I've gained a touch of paranoia. I second guess myself, even second guess the world." This is not only a plea for sympathy but a pointed finger of look-what-you-have-done-to-me-what-did-I-ever-do-to-deserve-this accusation. If the reader sees his or herself as a good, open-minded individual, he/she may have misgivings about his/her actions after reading this.
There is a suggestion that if they start over things will be different ("I guess I just wish that I had known it was coming"), but no direct promises or even a direct suggestion that it would have made any difference to the writer to know that the reader was leaving him/her. Finally, there is a plea to vanity: "I know I'll get over you, but I don't want to." I feel like that must work like a charm with empaths, if only because it sounds like a sappy movie line to me.
Our reader who sent this letter is right to be suspicious, I think. Even if the writer is not a sociopath, I am sure the friend has a very different understanding of the contours of their proposed renewed relationship than does the writer of this letter. Not only that, I believe that was the writer's exact intention.