She never lied.
She didn't reveal the whole truth while they were in thay fake relationship. She deceived her, which is basically telling a lie.
She didn't deceive anybody. Not providing a personal secret when *not asked* is not deception. She was asked to participate in a *fake* relationship. She agreed to participate in the *fake* relationship. When the prospect of real feelings was brought up, she mentioned that she did *not* want Yuna to fall for her, and that she wanted to keep the relationship *fake*. Yuna never asked her how she felt, or asked why she wanted to keep it fake. She never even told Min how *she* felt. Yuna literally just decided on her own that Min was in love with her, because why else would she be nice to her?
The answer, of course, is *because Min is nice*.
It isn't Min's job to be a psychic who can head off Yuna's feelings at the pass. I feel sorry for Yuna's heartbreak as much as anybody, but it isn't Min's fault, it's Yuna's.
For me she deserved what Yuna told her (even though she didn't really mean it because she was in the heat of the moment), and for you Min didn't deserved it. Let's just respect ones opinion because we have different pov, experience in life, and understanding that will contribute to our own opinion. ╮(￣▽￣)╭
Regardless of whether or not she deserved what was said, you are objectively wrong when you say she lied. She didn't lie, she didn't deceive. That's not a matter of opinion.
That's what you get when you lie to someone, even if its a 'fake relationship'