The speaker is describing a quiet, steady love for a man they admire deeply. The poem opens with the image of a private garden, where the thought of this person is kept and allowed to bloom. That garden suggests something tender and hidden, a feeling the speaker tends alone. But the feeling isn't gentle only: it runs "like hot blood" and "flowing lava," so the warmth is strong and lives deep in the heart.
The speaker lists what they see in him: intelligence, talent, art, poetry. Then the language turns to flowers, with "a flower" and "a violet," and to colour, with "a magnificent hue." The line "a bestfriend" suggests the admiration is rooted in friendship, and the speaker says it has been growing for a long time. The mood is devoted, warm and dreamy. The closing line, calling him a "beautiful dream to dream," leaves the sense of a love that is cherished in thought, offered with sincerity and without pressure.