Your address,


Dear (friend's name),
                             How is life on your side? Hope your studies are going well. I wrote you this letter to invite you in my birthday party. As you know my birthday is next week, so this time I m throwing a party. You are one of my close friends so I am inviting you especially and you should surely come.
                            Give my regards to uncle and aunt. Excited to meet you in my party.
Yours lovingly,
(your first name without title).