Write sorry letter to girlfriend, and more reading
Supposed you asked your girlfriend what's her favorite color and she replied blue and after some time she asks you what her favorite color is and you take a guess and say red, you better be prepared to witness a tantrum. Only ask her those girlfriend questions which will get you to know her better. A girl can get very frustrated if you keep rattling on about your favorite sport or other interest. What does she dislike what does she like. Dig deep and find out everything about her, like movies, hobbies, favorite actors, actresses.