cheshire cat?
Either expression is correct, however 'I am pleased to meet you Thomas' is more commonly used and probably sounds more natural.
When trying to find the solution to a grammar question, the trick is to figure out if the word you are using is a singular word or a plural word, The word "couple" is a singular word - you have one...
"As pleased as Punch".
It just means "very pleased."
happy (She is pleased with you: she is happy with you)