The thing is, all trannys are artificially "beautiful". You are falling for an illusion. I don't think it's weird to be attracted to what looks like a woman , however at this point you should question your sexuality.
Gay - attracted to the same sex (you don't have to have sex to be gay---there are gay virgins).
A man is a man, no matter what he is disguising himself as. Just like a sheep is a sheep even if it has chicken feathers.
no, not at all, and don't let anyone tell you that. You are attracted to who you are attracted to, it's natural, and a natural feeling is never wrong. Some transgendered women are stunning, I've been attracted to a bunch myself. All that matters is how you feel towards here, go with your instinct :)