I guess being 'trans' could be classed as a mental illness cos everyone that says they are anything other than male or female has a serious mental illness lol
people who are trans don't think they are a different love, they think they're a different gender, which is a specifically different term and has no set amount. love is binary, gender is societal and changes constantly. obviously saying 'im a girl' doesn't mean your X and Y chromosomes suddenly changed, it simply means you are of the female gender, which is true as long as you identify with it
they have a different definition. when you acknowledge someone as male or female or whatever, you are acknowledging them as their gender, not love. its called gender pronoun, not love pronoun