You feel there was a difference between a father taking sexual advantage of his child, and a half-uncle having a sexual relationship with his half-niece. Is this because there was distance between you and your half-uncle such that he might have simply been more like some guy you met, versus a relative? Was he involved with your life when you were a child or did he only meet you later when you were a grown-up? If you feel that it messes up your life to be told that this was a bad relationship when you think it was a warm one, don't live in shame.
It is VERY possible that you were in love with your uncle and you have good memories of being with him AND he abused you. That is very possible.
If you didn't FEEL abused then the only way to know if you I really were or not is to answer a previous question HOW OLD were you on the day you lost your virginity to your Uncle? This one question will tell you whether or not you were or were not abused. Especially if your uncle was older than you.
You and your uncle were having an affair, meaning either you or your uncle or both of you were married to someone else when you and he were involved in a romantic and sexual relationship, correct? Did the other partner feel your uncle abused you?
I am sorry, I really don't understand what you mean by HALF UNCLE??? He is either your uncle or he is not your uncle???
This is a made up term that doesn't exist where I live in Ontario Canada.
My ex husband has a half brother and two step sister's, each of them have grown up and married a partner. My daughter now has SIX aunts and uncles. I have never in 17 years allowed her to say half aunt half uncle or step aunt or even uncle in law, they are ALL EQUALLY my daughter's aunts and uncles PERIOD. And if she now at age 17 slept with any of them even if she wanted to I would Fu***** **** their *******!!!!
How old were you and how old was he?
Honestly, don't let others tell you what you lived.
For what is worth, as far as mental illness is concerned, nothing is considered 'illness' if it does not meet, among others, the criteria 'negatively impacts the sufferer's life', and while not spot-on relevant, what I read from you tells me your affair did not hinder your life (and in fact, getting it labeled as abuse has). Take a cue from that.
You know better than anyone if you ever felt forced or tricked, and if not, then it was not molesting, period.
Heck, even if it were, and it's not from what you've said, nobody cares about the 'truth', only about your well-being, and if that dictates it was not wrong, it was not.
Socially, the 'my first affair was with my half-uncle' raises an eyebrow, but that's only a thing until people get it in their noggin that it was consensual.
Do you know what relationships with semi-relatives of differing ages is called? 17th century royalty. And the only problem about it is weak genetics in offspring (and you had none, so you don't care about that either).
So to sum things up: You are the most reliable witness, so we can say, objectively, it was not abuse. We know what works and what doesn't so, subjectively, it was not abuse. Bringing another field's criteria into this? Still says not abuse. Socially? A) Who gives a flying poo, B) still not abuse if anyone bothers to figure it out, and C) if you thought 'social norms' have any meaning when people's mood is in question, remember how short-lived they are anyway.
So, yea. Be happy, be confident of what you know, and if anyone tries to disagree, touch their nose, make a high-pitched 'boop' sound, and refuse to acknowledge further efforts to tell you your business.