1) you should clam down;
2) you may say sorry to your GF's firend;
3) you say make agreement with your GF's firend;
4) you say buy some gift (better is food) don't too expensive to your GF's friend as a compensation;
5) your agreement with GF's friend should not disclose to GF's friend.
6) you should told your girl friend on that day, you are with her, but nothing doing
