The speaker is in love and afraid of losing it. Everything looks beautiful to them right now, and the poem fills with cherry blossom imagery: pink light, morning dew, budding branches, a sunset. Small domestic details, like the scent of a partner's detergent mixed with the speaker's perfume, make the happiness feel close and real.
But the joy is shadowed by doubt. The speaker suspects the dream they have built will one day fall short, and they picture themselves as a lone daisy on a stormy night, or as petals torn from a branch. The "rose tinted glasses" are worn on purpose. The speaker knows the view may be an illusion and asks to keep it a little longer.
The ending is the saddest part. Being cut "at the roots" suggests a breakup would leave no chance of growing again, and the final words, "with you," make clear that no future sunrise would matter without this person. The mood is tender, dreamy and anxious all at once.