Few people are interested in getting to know someone that never laughs or smiles. They see them as self-absorbed or just angry. People that have problems connecting with others often learn how to joke about many issues. They use this as a shield to protect them from the world. What they do not realize is that laughter makes people more attractive. If they can just work through their confidence issues, their ability to make people laugh can be part of their popularity instead of a shield.
It may not be easy to learn how to be confident. Many people have underlying issues that have developed over their lifetime. Seeking professional assistance with identifying the issues is the first step. It may take a lot of hard work, but resolving their issues may help them find a better life. They can still be funny, but instead of using it to hide from others, it can be used to attract that special someone they seek.