What would you guys do if you had a friend who's clearly obsessed with someone?  What do you do when you've given them logical advice 'til you're blue in the face but they never take it?  What do you do when it's clear that all this person wants to do is recite inconsequential stories about this person over and over gain just so she can say his name? 

I obviously have someone in my life like this . . . this guy has completely disrespected her, gave her a VD (yes, thankfully it was treatable) and clearly wants nothing from her except sex.  She is absolutely in denial.  She thinks they have "a connection".  Since they've met, he's fathered a child, not by his estranged wife, and is now involved with yet another woman, who's married.  Clearly this guy has no character. 

She's joined his gym, and now she's going into business with him.  I'm kind of reaching my limit with discussing him but I don't want to do irreparable damage to our 10 year friendship.  I've already explained that I have no respect for this "man" whatsoever.  I don't really know why she keeps bringing him up.  It's very sad.  I've been there, kinda, but never to this extent.

What to do?  I should point out, that since the VD incident, she's had no physical interactions with him.  I told her the other day that listening to her talk was like hearing a story about a cat and a mouse.  She's the mouse and he's the cat.  She still doesn't get it.