
That's what literally happening but they're asking for the symbolism/meaning behind it. I'm also confused, but maybe by giving her the rose that symbolizes his feeling and her taking it from his subconscious he’ll literally no longer have his feelings for her bc she has them? Also since the fragment was made to keep the leilas trapped maybe the flower trapped his feelings and that's why?

It is better to keep the fragments separated- if vinter/ Penny is found by leila/ yvonne with both fragments all would be over.
She lost his love means - he confessed his feelings and she refused them aka he has to 'let go' of his love.
She gained his trust - she offered valuable information about leila AND about herself (which she hardly ever does!) aka they're fighting the same fight and she's an ally
The flower represents his love for her in his mind - Penny handed him one of the fragments once so he's connected the fragment with penny in his mind - that's why the roses (the representation for his love for Penny) roots are tangled with the fragment (which penny gave him)
Does this explain it for you? :)

Loosing Love: Since the purple rose is growing inside his subconscious, it has two options. As he said, he realised to late the two options the rose was blooming for. He had cut off the rose himself & gave it to her. So with that, he looses the eternal love for her, as he handed over his feelings in exchange for thrust to keep the fragment save. (Probably the reason why there are tears in his eyes. He sacrificed his love for her. As he chose the option: incomplete love)
can someone explain ch.177 in better detail? like i understand it that Vinter has purple love aka unrequited, eternal love but how does him giving her the rose show that she gain his trust but lost his love?