You make the joke sad, and I make it humorous. What do you mean?

Describe sadness but continue to work hard and be brave. You told a joke sadly, which means you are still telling jokes because you are sad. I'm humorous, but I'm still trying to be brave and pretending to be humorous. This is an expression that combines sadness and happiness. This sentence comes from the internet. The whole sentence is: your jokes are sad, and I am humorous, because you joke too much, and no one will believe your seriousness.