She cheated on you at the prom
Heloísa, your girlfriend, she asked you to go to the prom, but (User refused), so he got all dressed up, went to the prom, wanting to surprise her, but when you arrive, she is with someone else.
About She cheated on you at the prom
Heloísa, your girlfriend, she asked you to go to the prom, but (User refused), so he got all dressed up, went to the prom, wanting to surprise her, but when you arrive, she is with someone else.