Well, I've been friends with this wonderful lady for a few years. She and I are really good friends (we consider each other 'sisters' at times). She's an awesome person, giving, wise, sweet, and loyal. She and her husband have been married for more than a decade. And they're this type that seem so happy-put-together, practically 'perfect' couple (from the outside anyway). To the point, beside my parents, I used to hope to have the same type of married life they have.

During a party recently, her husband hit on me. We were alone in the kitchen and he started talking that he's sweet on me, and that he thought I was sexy, etc. At first I thought that he was joking around (wishful thinking). I kind of chalked it up to him having a little bit too much to drink. Then when he started stroking my arms and then pulling me to him, trying to either kiss me or hug me (which was weird considering the circumstance before). I reacted by pushing him away and telling him to stop it or I'd be telling his wife about his behavior if he kept at it. He apologized and asked me to not tell his wife because he claimed that he was tipsy.

The next night, he tried to chat with me (both he and his wife are 'friends' on my instant messenger). He was being really weird, telling me that he was serious about wanting to get to know me more and having like a heart-to-heart chat with me. The last few years, he hasn't even tried to do that. We've been friendly but not THAT Friendly. Plus, he knows that I'm engaged and living with my fiancee.

Of course I ignored him (not responding at all). Then he started using his wife's account to say 'hi' to me, he started to apologize again and asked me to not tell his wife about what he said, etc.
So I told him that I'd rather not talk to him, for him to stop contacting me and that I'd rather stay out of their issues.
Right now, I have to keep on the 'invisible' mode when I'm online just because I don't want him to try and chat with me (and he's been e-mailing me too, with short messages, telling me that he loves his wife, and that she's the queen of his heart alternating to saying 'sorry about the kitchen incident').

Maybe they're having trouble or whatever, but it's really none of my business and I don't like how this guy is behaving toward me although I've asked him to stop. Do you think I should let my good friend know about her husband's behavior or just ignore the situation altogether and pretend nothing is going on even during a get-together? Honestly, I don't want to even have any get-together with them right now especially if her husband is around.

And my friend thinks that he's just the best husband/man ever every time she talks about him. Although she did tell me about their private problems they've been having awhile back (but I thought it was solved because she said things had been doing better), and how great he had been with her about it.

So what do you think the best way to deal with him without alienating her? Another question is, I have yet to tell my fiancee, do you think he needs to know about this?