well.. today has been a long day.. especially what had happened?

So i had to go to school to ge some documents to be done, so he waited for me because he had to get some documents. So then we got on  a bus and as i was trying to write something done, he got out an envelope and it said my name on it.. then he said i liked you for a long time and i hope we can be together.. for a moment i though he was just kidding around but then i looked at him.. i can tell he was very serious.. but i said perhaps you can ask me after examinations and i'm afraid i can't take the envelope ( i was saying it as a kidding way O so should i not take it?) so i said perhaps after examinations and so he was very depress.. i don't understand...honestly i need to think about this...

so when we were walking together, he been very quiet and i feel there's a wall in between us... i feel that this harms our friendship..  i feel somewhat upset seeing him being upset... honestly i like him as a brother, as a good teacher, as a good aprtner for account, as a good friend, as someone that can talk with for all my troubles.

I do not understand but this is what happened.. i hope he is not upset about us just  being friend.. will it work if i tell him i like girls? or i like someone already? or i'm dating someone already?

please help and give advice