[ask]if I like trans girls this means I'm gay?

I in love for a trans girl(MtF), and all my life I thought this is "gay" stuff( I never liked haired mans and this kind of thing). I'm in a big dilemma but I love her. This makes me gay? She consider herself "gay"(I don't understand too well this). If yes, i want to be gay only for her. PS: sorry for the stupid question and if I offended someone my apologies. Thank you guys.