I have "the aura". And although I don't know what that means, I've started asking anyone who asks me if I'm actually gay, what leads them to that assumption.
The current top picks are:
I look put together,
I care about hygene,
I clean my home,
I'm usually friendly,
I look happy.
Like… their assumption is correct. But when did caring for oneself become a sign of the big gay? What are straight people doing?!
It's an impossible accusation to disprove, because it's not a thing you did, it's your preference. You can only "protest too much" or "protest too little".
Likely the other person wants the relationship to end, but can't stand the idea of it being their fault. So it's the "closeted" person's fault.