We rode in the cab, and my friend looks at me with the most serious face and tells me they are Bi-Sexual. Though they said they usually only date the same sex and they hadn't ever told anyone about it.
Your friend must trust and care for you a lot to confide in you like that. how did you react?
I told them that it didn't matter to me, and I still loved them like family. 
That's good. you must have been surprised by the confession.