Dear [Name of recipient],
It gives me great pleasure in expressing my happiness about the news of your engagement. Many congratulations to both of you. It was a great feeling to receive the information of your engagement; both of you together are an adorable couple.
From today you enter a new chapter of your life, I feel very happy for you as you found your lucky charm in your future wife. As you eagerly wait for the big wedding day, you ought to remember to take things slowly, enjoying every bit of your life with your better half, accepting the warm wishes, gifts of people on your wedding day and enjoying to the fullest.
I will be present at your wedding to help you with all the wedding plan and accompany you as you take the steps towards an essential part of your life. I feel so excited and delighted for you as you take this new turn in life.
You must be very excited as we get prepared for your big wedding day. I cannot wait longer to watch you and your fiance together for getting married. It feels so great even imagining you both together. Congratulations again on your engagement, All the very best for a great future. I know you will be ready to fulfil your duties as a loving, caring and responsible husband.
(Name of the sender)