Your girlfriend cheated on you and you don’t know what to do? My stepfather will teach you. First, don't humiliate yourself. Don’t write sheets to her, don’t ask “why,” don’t throw tantrums. At this moment you are either a man or a rag - there is no third option. Second, don’t make excuses for her. Alcohol, girlfriend, “I’m confused,” “this doesn’t mean anything” - all this is bullshit for the weak. Cheating is a decision, not an accident.