Has anyone slandered your name here?

Yes actually i have been. I friend of mine left here after an incident and i felt partly responsible he'd decided to leave. I put up a post telling mutual friends to message me if they wanted the full story as i didnt want to post it for all to read, partly because i didnt feel it fair on my friend who was no longer here. One friend messaged me and asked what had happened so i told him privately. He then told me i must make it public because i was only not doing so so i didnt look like the villan. I told him that wasnt why i didnt post it publically, i just didnt feel it needed to be public as the other person involved wasnt around to ask. This 'friend' then told me i was a lair and i manipulated the facts to avoid looking bad. He then posted that on a public post stating i was a liar and only cared about how i looked to others. He posted a number of times i was a lair and in the end i blocked him. One evening weeks later, whilst replying on a post an unknown user started calling me a lair and using my real name.....it was obviously that person on an alt. acc. I was quite shaken. Admin acted quickly and he was unable to contact me again. He clearly wanted to paint me as a liar and influence the way others here thought about me.