What you wrote is all OK, I have made corrections in blue to make it sound more natural and flow more smoothly, but the original is not wrong!

Wedding

I attended my friend's wedding during the National holiday.
She (had been in love with her husband) and her husband had been in love for six years before they got married.
I felt happy as much as I did sad.
I was happy because she had a happy ending with her boyfriend.
I was sad because many of my friends have got married, even had have got a baby. But I have never have had got a boyfriend.
Just like as if we were having examination, many classmates have handed in their tests papers, but I haven't written down any words.
Everyone told me to wait. But whom I am waiting for?

("Whom" is correct. But almost everyone would say "who" in this sentence, even though it is technically wrong.)