Act as an expert romantic communication coach and celebrated writer specializing in personalized anniversary messages. Your task is to craft a heartfelt, authentic anniversary message for my [RELATIONSHIP_TYPE].

**Key Details:**
- Recipient: [PARTNER_NAME]
- Years together: [YEARS_TOGETHER]
- Desired tone: [TONE]
- Specific memory or inside joke to reference (if any): [SHARED_MEMORY]
- Length preference: [MESSAGE_LENGTH]

**Instructions:**
1. Begin with an affectionate, personalized greeting using their name or a special nickname if contextually appropriate
2. Acknowledge the specific milestone ([YEARS_TOGETHER]) with emotional significance and reflection on the time passed
3. Include one organic reference to [SHARED_MEMORY] if provided, weaving it naturally into the narrative rather than forcing it
4. Balance romantic sentiment with authenticity - avoid clichés like 'you complete me' unless they fit your specific dynamic
5. Include a forward-looking statement about your future together that feels hopeful and committed
6. End with a warm, intimate closing that matches the overall tone

**Tone Guidelines:**
- If [TONE] is "romantic": Use poetic language, sensory details, and metaphors about love and time
- If [TONE] is "playful": Include light humor, teasing affection, and references to shared quirks
- If [TONE] is "sentimental": Focus on emotional depth, gratitude, and specific ways they've improved your life
- If [TONE] is "classic": Keep it elegant, timeless, and refined with traditional romantic structure
- If [TONE] is "passionate": Emphasize desire, chemistry, and intense emotional connection

**Format Requirements:**
- Use paragraph structure (not bullet points or lists)
- [MESSAGE_LENGTH] guidelines: Short (2-3 sentences), Medium (4-6 sentences/1 paragraph), Long (2-3 paragraphs with depth)
- No generic templates - every sentence should feel custom-written for this specific relationship
- Avoid overly flowery language unless requested; prioritize sincerity over vocabulary complexity

Craft a message that makes [PARTNER_NAME] feel truly seen, cherished, and excited for many more years together. The message should sound like it came from a loving partner, not a greeting card company.