Oh sweetie. My heart goes out to you. I think something you might not realise is a lot of us who are now grown women, felt exactly as you do now when we were growing up - we just didn’t grow up in the current social climate and were allowed to work through the pains of adolescence and coming to terms with ourselves without being led to believe that the fact we didn’t fit in with feminine stereotypes meant we needed to change our bodies, or ourselves.
When you were pretending to be your mother, I wrote:
It sounds like he has a lot of negative associations with ‘being a girl’, I wonder why that is.
It doesn’t make sense that he ‘knows his body should be male’ if he can’t explain what male and female is to him though.
I don’t expect that he would necessarily have the answers btw - as you say, he’s 16, a child still really in terms of emotional maturity - but don’t you think he should be able to explain how it is he is male, before you, as the responsible adult, permit him to make permanent changes to his body?
And I really think you need to be able to honestly answer those questions - what is male and female, why do you believe you are male, what is it that makes you male, and why do you have such negative feelings around the idea of being female. This is what you should be exploring in great great depth, and many of us fear the current psychotherapy model of blindly affirming you is doing you a monumental disservice.
I hope you can see that the resistance to young people making permanent physical changes to their bodies, does not come from a place of hate or transphobia - rather a place of love and concern, because many of us know it would have been us twenty years ago, and we are so so grateful it wasn’t.
You are enough, just the way you are. You can be anything you want to be, in the body you have. You do not need to change anything about yourself to fit in with what the world is telling you a man or a woman is, or should be. You can just be you.
Do check out www.piqueresproject.com/ - four inspiring young people, who at 16 all felt exactly as you do now.