a broken promise

so this takes place online where you meet with this girl *btw this is a true story that happened to me* and you become great friends with his older sister and her *btw your a 10 year old here* until around a few months in you and her little sister become girlfriend and boyfriend and then 1-4 months in your gf haven't texted you in a couple of weeks the only one that's texting you is the sister your cousin says "I heard if your gf haven't been texting you they have another one" so that means she's cheating on you