I don't think it's as hard for me as for my friend. I'm not the one making a life-changing decision, I'm merely making a decision that impacts a single friendship. But I'm going to be honest and say that a lot of you don't seem to understand what I'm trying to say. It is a lie, because it is a personality that was put forth that he, at some point in his life, acknowledged as an untruth. It's not about knowing everything about people (though my innermost circle of friends do share everything with each other) but the fact that there are parts of your friendship with this individual that aren't true. Things that you thought you knew about them but really didn't, because they told you so.
Yes, this is more difficult than confessing you are gay or bisixual, because that doesn't really change your friendship. It changes your six life, but I'm not a part of their six life. If a woman finds out that her husband is gay, she has a right to feel somewhat lied to. She's loved him for years, what does she do? Does she resent him for lying to her all these years, or does she support him in what is essentially ruining her own marriage, a marriage she was quite happy in? It's not an easy choice.
What I do know, however, is that there is something in this individual that still values our friendship. Me specifically, because he came to me about it first, but he also told everyone else as well afterwards. I'm not sure if it's a reach out to continue our friendship, or a warning that he knows we were close, and things may change and go in different directions. But he does want support, and support I will provide. That's the least I can do, and for that matter, probably the only thing I can do. Call me self-centered, but I do prefer them as they were (as they still are until they actually start the transition) because this is the person I've been friends with. If I was able to get over this change so easily, it would mean that I didn't really care about the person that I knew.
The thing is, even if something is "a lie", it is not necessarily YOU being lied to. While the situation of course varies with the person, many people do not promptly and aggressively accept this (judging by the time you've known them, this person obviously hasn't either). It's not typically something they just discover. They spend many years knowing
something is wrong, miserable because they don't know what or how to deal with it. They don't like the way they dress or look or act, but are told by the world around themselves that that's normal, and therefore THEY are abnormal if they deviate from them. They may hide these factors so others don't hate them, peers and family, or repress them in the hopes that they will go away, and they will "grow out of it" and become "normal." They might misunderstand it as sixuality, mental disorders, and spend years depressed and confused about themselves. If they DO eventually come to the conclusion of being transgender, they might spend
more years in denial because they don't want this, refuse to accept it about themselves, and delude themselves into thinking it's something else.
When the truth of the matter is finally accepted and confronted, they have several choices to make. Ignore it and quietly suffer for the rest of their lives, being at high risk for developing a lot of disorders under the stress? Tell their close friends so they have some outlet, risking that these best friends they've known all their lives will no longer accept them? Try to change their lifestyle and finally put an end to some of the pain they've had to deal with, accepting further risk of alienating those around them and more of society as a while? These questions alone are huge issues that people can spend a long time trying to decide on, or working up the nerve to do anything about. None of this is an active attempt to deceive. The only case in which you'd be lied to, ironically, is the one in which the change never happens. Your problem only came about because this was revealed, and you admit to preferring the "original" person, effectively stating that the situation you want is the one in which you are lied to, and that you are unhappy because they chose to tell you the truth as they finally accepted instead of lying to you.
"If I was able to get over this change so easily, it would mean that I didn't really care about the person that I knew." Not quite. If you CAN'T get over it, that's the case. As has been repeatedly stated to you, there is not a new person coming out of this. A lot of people stop playing with action figures in the sand as they grow up, because they change, but a lot of people also manage to remain friends with people they were friends with as a child, because the core person that they were has not suddenly become a new person. If you can't get over the superficial change that does not change who they are, it means that you didn't really care about the person you knew, and the only lie of importance was apparently whichever one you were telling yourself.