Your Transgender Roommate

Your roommate is your best friend. They talk to you constantly, joke more than actual conversations. They comfort you when you're down in the dumps about something. But there's a secret they've been hiding for the duration of your friendship. They're transgender. (either ♀️ -> ♂️ or ♂️ -> ♀️) How will you find out and will you react? It's always your choice.