The speaker is looking back on a love that went nowhere, and the feeling is a quiet, bruised resignation. In the first lines they offer roses, the classic gift of love, and the other person lets them die. That small act of neglect says a lot: the affection wasn't valued. The line "I was already knew" is grammatically awkward, but it reads like someone admitting they saw the ending coming all along.
The second stanza turns more dramatic. Fire set to "our rain" is a striking image, since rain and fire are opposites, and it suggests the speaker destroying something shared, or watching it be destroyed. The fire burns "on your hand," which hints at pain, perhaps blame, though the poem doesn't say exactly who is hurt. The final line sums it up: the speaker was "romantically hopeless" to this person. The mood is sad, tired, and a little defiant, like someone who gave everything and finally stopped expecting a reply.