Hi [Friend's Name],

I'm so excited to invite you to my birthday party! I'm turning [Your Age] on [Date of Birthday], and I'm planning a fun celebration to mark the occasion.

The party will be held on [Date of Party] at [Time of Party] at [Location of Party]. We'll have [mention food, drinks, activities planned - e.g., music, games, food, cake, etc.].

I would really love it if you could come and celebrate with me. Your presence would make my birthday even more special.

Please let me know if you can make it by [RSVP Date] so I can finalize the arrangements.

I can't wait to see you there!

Best,

[Your Name]

[Your Contact Information - Optional]