I was diagnosed with Aspergers in my late 30s.
That article could have been written by me in almost every respect.
I spent my early teens to now, really, feeling permanently suicidal. I haven't acted on it yet, so I doubt I ever will - it's not an immediate or pressing drive but it's always there. I also had a very extreme goth image and I was aware even then that the image aspect of it was about 'recording' how different I felt and how unrecognisable everyone around me was - and keeping people away from me. I had therapy as a teen and was 'diagnosed' with an 'artistic temperament' and told that many people like me found it difficult to fit into 'normal' society and that explained my difficulties with other people and emotional self regulation.
As a late teen, I dressed in a very androgynous way - skinny black Jean's, docs, black oversized jumpers. I hid myself away with my music. I had a fairly extreme goth image until I was nearly 30.
As a younger teen, my parents mocked me for locking myself away in my room and reading. My special interest at the time was horses and I had an encyclopedic knowledge of them to the point I could recite pages out of books word for word.
I still practise conversations - I run through them in advance, anticipating possible scenarios, re running through them afterwards to check I didn't fuck up.
If this trans thing had been around when I was a teen, I think I'd definitely have accepted it as an explanation for my difference.