I have been dating this girl for a while and everything has been fine between us. The problem is her ex is being very AFC and won't leave her alone. Last night he calls and says that he wants to kick my ass. I'm usually not the type to back down from a fight but this dude is a lot bigger than me(I'm about 5"11 180lbs and he is about 6"3 250lbs) and has a rep for beating people up. I don't know what to do because I don't wanna look like a ***** and back down but I also don't wanna get my ass beat trying to look tough. Any suggestions on how I should handle this.