Will these feeling go away? I can almost guarantee that if you're still feeling them at your age, they will only get stronger as time goes on. Hell, I bet someone would have an easier time trying to dislike chocolate when they originally loved it than to try and make these feelings go away. The point is, if suppressing your feelings about wanting to be female isn't working, then try embracing the idea!
Will there be pain? Yes. Will there be heartache? Almost certainly. But think about it. Think about how horrible you can get while depressed. Do you really want to feel that your entire life? If the answer is no, then you should take the first step forward. That first step, my friend, is usually education about the subject. The second is therapy. And trust me, even if you were to end up changing your mind, both of those would help tremendously.
Lastly, remember that no matter what options you choose, you will always be able to find support here and in other places. That said have a nice time at Susan's!