Standards Boards Help

Ok so here goes,

I am 2nd year member of my fraternity and I am having trouble with my standards board.

Long story short, my big bro and i were sorting out a parking situation with a girl in our lot (yes, stupid i know, but we only have enough parking for the brothers, and we have a brand new $3.7 million house and we don't take kindly to strangers, as many, many issues of vandalism have already occurred. we take this pretty serious.) and her boyfriend comes out of his fraternity house from across the street with 12-15 guys, thinking that we were giving her crap and were looking for a fight or whatever. one of their pledges comes across the street and literally out of the blue hit me up side the head. i leave after an exchange of words and go up to my room to sleep.

I find out the next day that a letter of standards is being written against me for causing a fight with another fraternity, yada yada yada. I have talked to members of said fraternity and they are taking the blame for their pledge and saying I did nothing wrong, my big bro says i did nothing wrong, but yet i am still going to standards.

Can anyone shed any light on this matter? what i should do? what is most likely going to happen? etc. any advice will help.