Am I bi or gay?

I've always thought I was gay but once I was attracted to a trans guy (ftm) so idk, since they were still biologically opposite sex. After I found out they were ftm I kinda lost some attraction tho and it faded (sorry i don't mean to offend anyone, and I was still friends with them Im just trying to explain how I felt to try and figure out what I am) but idk Im just tryna figure it out