She's still mad at me. What should I do?

I need to fix what has been done wrong for the past week. I am the reason why my girlfriend has been very cold to me since that event. This also means that I need to gain her trust again. It might be a hard thing to do but I won't waste the chance of being the best guy for her. I've read a lot of articles regarding second chances, some in a foreign bride tours, and so far, they are inspiring. I think I should give my best shot in winning her side again. What else can I do? Please tell me.