I think you should tell her that you forgot it in her party. Because it will make her forgive you. But if you go hathoe, she came to know that she is angry with you.
I think you should tell her to meet me you forgot her party. It will make her forgive you. If you Magog for her, she knew that she would be very angry with you.
I think you should tell her the truth that you forget her party. Because it makes you to forgive you. But if you โกกห you and you know that after she was very angry with you.