I don't know that and neither do any of us. Sometimes, we have to do things to make us feel happy and love ourselves more. Maybe God wants us to do it, maybe He doesn't. Just embrace the differences, man and live life to the fullest is all I have to say.
You keep turning away from my arguments. I attacked your idea that God allows for transsexualism, I have proven you wrong, you have been unable to prove me wrong or to biblically support your case, and yet you do not admit that you are wrong!
Do we really have to do things that make us happy? Do we? Do we not instead have to do things that make
God happy? Do we not have to obey his commands (John 15:9-10)? If what you want for your life differs from what God wants for your life, will you do
you want? Really? Then why do you call yourself a Christian if you do not live like one? Have you never realised that the apostles never did what they truly wanted, but instead obeyed Jesus' command to go out into the world?
Do we really have to love ourselves more? Do we? Do we not have to love God more than ourselves (Matthew 22:37-39)? Think about what you have just said.
‘Maybe God wants us to do it, maybe he doesn't!’ Yeah! Let's just do whatever we feel like! If God likes it, great! If not, too bad! Who cares? (Do you really think that this mindset is reasonable, given that you call yourself a Christian?)
All in all, you need to understand that we cannot always do what we want. We must do what God wants, instead. Certainly, sometimes, we cannot tell what he wants for us, but we must seek his guidance at all times. We should delight in obeying the Lord (Psalms 1; Psalms 119). Nevertheless, in this situation, through the Bible, we can know exactly what he wants: he wants that girl to stay as she is, because God hates transsexualism (and I have already shown why we know this). Our conscience can tell us the same thing: it is wrong (and I have already shown that as well). Therefore, we must discourage her from committing this sinful act, not support it.
Thrash, this is my plea to you: think about what you are saying. Actually think about whether it really is reasonable for you to say that we should do whatever makes us happy. Think about how that life philosophy would impact your relationship with God. Please do not perceive this as an attack on you. Just think about the consequences of your idea and judge for yourself.