Are the school still allowing you to go?
There is nothing better than a genuine heartflet apology in my view.
Say sorry (and mean it!), tell her you understand her reasons for stopping you going, and will abide by them without complaining, but ask her if she could possibly reconsider. Explain that you know that you did wrong and that you have shames and embarrased yourself as well as her and that you have let everyone down and would like to make amends by showing that you can be responsible and grown up.
That would be a start...........and don't get in any more fights!!!!