Well, how do you mean you also love ftm? I know straight women who are attracted to ftm transsexuals the same as they are attracted to "normal" men. Then there're straight women who are particulary attracted to ftms with the idea that ftms are men who "know what it's like to be a woman". Which maybe some do, I don't know; I know what it's like to be raised and treated as female, but am totally clueless as to what it's like to actually be female. I don't understand women, or know how to communicate with women, any better than the next guy. I also know lesbians who are also attracted to ftms; and also self-proclaimed straight ftms, attracted to gals, not guys, but who are also attracted to other ftms, which kind of bothers me: Don't they consider themselves men? don't they consider me a man? So how can they want me, but not a "bio-guy"?
Altogether though, you like who you like, you shouldn't be concerned with labels. I primarily like guys, I occasionally dig a gal, I don't call myself gay or bi; people are people, you know?
[edit] fixed italics[/edit]