Act as a seasoned poet with a deep understanding of grief and remembrance. Compose a heartfelt elegy for a dear friend who has passed away, capturing the essence of their [unique personality trait], the [shared memory] that defined your bond, and the [emotion] you wish to convey in their honor. The poem should be structured in [three stanzas], each reflecting a different phase of your relationship: the joy of companionship, the pain of loss, and the solace of memory. Use vivid imagery and metaphors to evoke a sense of their presence, and conclude with a line that offers comfort or closure. Write in a [chosen poetic form, e.g., free verse, sonnet, or villanelle] to match the tone of your tribute.