Saying bye to a friend is hard

I need to VENT. I have this friend whom I’ve known for over 15 years, and today, I decided to block and delete this person from my life forever. They are a compulsive liar who constantly makes up stories. I work with people who struggle with mental illness, and I cannot afford to let this person continue draining my energy. They fabricate stories about siblings they don’t have, claim their family members hold high-status jobs (engineer, lawyer, doctor, etc.), and constantly boast about their immediate family’s success, material wealth, and extravagant lifestyle. They talk about traveling abroad to complete degrees and other achievements that never seem to add up. The list goes on. When I catch them in their lies, they try to convince me that I’m the one who is mistaken, making me feel as if I imagined things they never said. Today, they called with yet another story, and I finally told them that while I know they have good intentions and I’ve enjoyed our time together, I have to let go because this relationship is not good for my mental health. They will be missed, but this is for the best. I am struggling with my own mental health and cannot take that burden.