It's all so confusing...

First off, Congrats on the new school! A fresh start is always amazing!

As for letting people find out about your sexuality. I would let them draw their own conclusions. If the topic comes up be real with them, and tell them the truth, however if no one is saying anything about it, I see no need to explain it. Just wait for the topic to come up, then address it. However, if they truly are your friends the topic may never come up, because it simply does not matter. Who you like, and who you are attracted to will not matter to them!

Congrats on your first crush! It may not be as impractical as you may think. It is his last year there, however it could be an amazing year! That is a lot of time to get to spend with someone, and get to know them. If he does have to move to the other end of the country, that's not always a bad thing. Long distance relationships are possible, especially if you grow super close to each other over the course of a year.

"Secondly, he is technically(don't know if that's the right word) still a girl, he will start his hormone treatment in a few month that will turn him into a boy. I don't have a problem with it, but it's bad timing, and it sort of makes me question myself and my sexuality.
And thirdly, he didn't say this directly to me but we were sitting in the same group when he said it. He said, I don't have any preferences, but I'm mostly into boys, and then he looked directly at me! I'm a girl, but a boyish one." --- NEVER. I repeat NEVER let anything EVER make you question your sexuality. Timing may not be picture perfect, but you can always work through obstacles like bad timing. Just because you over heard him say he is more into boys does not mean anything. He could have simply said that to try and make those around him happy. It could have been a lie, then again it could be true. However he said "Mostly" So that means there is still a chance. Don't give up, and follow your heart!
~Matt