My fault

Do not get angry at your friend over this, try and see things from his perspective. It is true that he acted childish but at this age it is to be expected, especially under the pressure of school. The ones at fault here are those who are being nosy as to whether your friend is questioning his sexuality/gender. There is no reason for this situation to directly affect how you feel about yourself, so I would avoid making a mental connection between the two as that will only complicate matters. Also if you can, try and look past the statement your friend made towards you.

 

It sounds like the argument with your classmate/friend has really set you back, so it might be worth taking a bit of time to reflect and recover your composure so you can get back some perspective on the situation.

Look again at what you said:

Do you see how the words in bold, immediately followed by the words in italics are totally at odds with each other?

Now you are questioning yourself and doubting everything and returning the focus to your parents and how they might react. The situation with your friend has opened up all sorts of stuff.

Is it your fault? No, of course it's not and I think you know that really. Be kind to yourself, give yourself some space to recover and understand that your friend was lashing out in the heat of the moment. His reaction wasn't fair on you, but as Rikudou pointed out, he too was under pressure. The fault is neither yours, nor his.