Seriously , what's with the flower ? http://www.mangago.zone/read-manga/ai_ni_dekinai_koi...

It probably got to do with the language of flowers (≧∀≦)

Like this 1 here:
http://www.mangago.zone/read-manga/ai_ni_dekinai_koi_wa_iya/mf/c001/2/

I think that's a Daisy right? If so then that symbolizes purity and innocence, but also New Beginning.

So I think the Mangaka add flowers in her story to symbolize something.

So that flower you mentioned is Cherry Blossom? ... lets see ...

*Google the meaning of this flower*

So it seems that and I cuote: "Cherry Blossom represents the fragility and the beauty of life."
(=・ω・=)