Libel case?

I watched last night a documentary report about libel cases on the internet. Being a blogger, I feel really involved if there would be a specific law that charges legal complaints on blog masters. In the documentary, there was an Australian who once had a Filipino boyfriend. That Filipino, unfortunately, only aimed for latter’s money and nothing more. In the blog of the Australian, he called the Filipino a theft, a liar, and other maliciously degrading words. Sigh. Now, I feel really frightened if I have had written discriminating accusations against some people. Better have some assessment on some of my past posts...