We are supposed to be moved by that love and by the hostility it reveals in some of these cadets, but there the film is discrete. Actually the sex difference, or similitude, itself is the least important element in a love relation that can be even just as strong and yet not lead to sex.
Wow I never said I love you to a guy before. Mourning is a form of love that attaches you to an object or a person that no longer lives or exists.
The appearance is the top surface of things and truth is necessarily underneath. His interactions with Roxie suggest strongly to some readers that they are brother and sister, but this hasn't yet been confirmed.
The film though shows him as a kid who makes his point and remains a kid and runs away from his anti-gay father, from his tolerant mother, from all his friends to go to London and what, tell me please, what on earth that he does not have there in Manchester?
Aaron is packed and sent back home in shame. Later he will run away from a straight party when he is called a queer because he dances in a rather exuberant way.