Is it ethical to blog both awful and pleasant experiences with your ex-girlfriend / ex-boyfriend? Discuss.

For me, I don't really know if it is unethical or ethical to post experiences with my partner or ex-partner but I think it is alright to post these experiences because it is our freedom. But when it comes to something that is really private or things that must be kept only between us , then it should not posted. If the post also harms or is affecting others unethically then that would be unethcial.