Cousin talks shit

So ladies would you get upset if you found this out

So two days ago my girl cousin msg me on messanger.. she told me how she had a hotel party or little get together with friends and there was a guy and his friends at her hotel party. Anyways she says the guy was talking too his friends about my dad and who ever else on my dads side of family. Mind you this guy is on my dads side of family too. My girl cousin knows my dad and whoever else on that side of family.He told my girl cousin how hes my cousin,than he started talking shit about me too his friends and her..not knowing me and her are related. She says she kicked him out of her hotel party. Im like which guy is that..she went on facebook and found him..sent me a pic..im like wow.

I have never done anything too him..and its been 4yrs since ive seen him.

In 2010 i found out he was my cousin and we hung out me and his other brothers which are my cousins too..and we got along. Now im hearing that hes telling everyone im a slut..and im loose and how i slept with alot of guys. Who does that? What kind of family talks shit like that?

That is so unnecessary,very childish.

Why call my name too say negative disgusting things about me.

I just found out a month ago he lives 5minutes away and wanted too visit him..but now im finding out hes talking shit.

Ladies what would you do?