situation: girlfriend kisses another guy one night (a guy she's into), but then she feels bad that she kissed another guy while she has a boyfriend, so she talks to her boyfriend the next day and breaks up with him, ending the relationship (presumably she doesn't have strong feelings for him anymore).
did she cheat? is she a cheater? can she be trusted in a relationship?
if they stay broken up i wouldnt consider it cheating since the relationship has prob been over for awhile emotionally..... if she takes him back // they stay together then yes
She cheated! I feel like it's a minor cheat and could be worked if they both love each other, although the fact she wanted to kiss another guy indicates she's emotionally and romantically over her boyfriend.