I was cheated by my best friend. How should I talk about it?

A woman who is regarded as a best friend deceives her feelings and wants to confess. Netizens provide two things with the following two attitudes for the reference of knowledge quiz:

By girlfriends? I am very sad that I cheated my feelings: Do you treat me as a best friend? I was honest with you, but you hid the truth.

By girlfriends? The feeling of being cheated is very angry: I treat you as one of my own, and you are a bitch to me, you bitch (this is anger).