This is sort of an AIBU but I thought it was better to be posted here.
DS is 16.
When he started secondary school he told other students he was a girl and wanted to be known as X (which I didn't know about until a friend called him that in front of me) which led to a lot of bullying although some friends were supportive. I told him I wasn't going to call him that name but we agreed a nickname which is similar to his proper name and let him wear whatever he wanted.
This went on for about a year and half until when we moved house and he went by both his proper name again and his nickname and he came out as bisexual not long after which I was supportive of and almost everyone else also accepted him apart from the odd few at his school but they didn't seem to bother him.
2 years ago, he got into a relationship with another boy and he sexually assaulted DS which I got him counselling for but that has impacted his MH.
Last year, he told me he was trans and he only hid it before so school would be easier. I told him I didn't think he was and our relationship has suffered.
He wears male clothes, has short hair and the only make up he wears is eyeliner (I am aware biological women can also do this but if he's saying he's female wouldn't he be trying to look it?)
We had an argument earlier as he accused me of being transphobic for not calling him a she
AIBU for not supporting him?