This is a few ways of getting a paragraph but it's very useful in informal letter writing or when you are writing to your friend or someone you know. To be sarcastic means to say something but yoi actually mean the opposite. Now leys write a paragraph.
Hi Kelvin. It's your best friend Nana Yaw, you wish. I just wanted to tell you about my new girlfriend i made and i'm sure you'll be mad to see me with her so good luck.
I was sarcastic when i said i was his best friend. This is how i can explain and i hope this helps.