<human>: Condense the text into a few key points

I really can't hold this enough.
My GF is 17 and wants to change gender.

I can't understand why she would take such a decision in a young age like this, even though she's been thinking it for a while now. This is something she should do around 25 years old, not NOW. It took me 18 years to find the perfect girl I love, the one that gave me great experiences and made me grow up a lot along with her, and I just can't think of losing everything for this reason. It's uncommon, rare, or I don't know what term should I use to describe this event, to see such a beautiful and lovely girl, ruin her body like this.

I don't want to ashame her decision, neither not support it, but It's hard for me... a lot. I don't think I will be able to keep things like this if she should change gender, because I'm not bi-sexual and neither I am open to those things because I'm not interested. 

Guess I'm selfish as fuck, and I recognize that, but I think that 17 years is way too early to talk about these kind of things.

People: enjoy life, don't just mumble about these kind of things, if you feel uncomfortable the way you are, it's because you probably compare yourself to someone else, you are beautiful in your own unique way, EVERYONE has something that someone else doesn't. Don't rush your life, enjoy it to the maximum possible.
<bot>: my gf wants to change gender at 17 yrs and I can't believe i'm going to lose everything for this.