Wow...this one is TOUGH. We really need some help here.

My best friend is engaged to my fiance's best friend. We always hang out together so the four of us have become very close.

We went to a  Super Bowl party with a large number of people because we are naturally Cards fans. My friend went to the game in Tampa so his fiance came with us.

The party started early so we got really, really, really drunk. We were having a blast (besides the outcome of the game of course) so the night continued pretty late. There as a handful of people still partying but most had cleared out.

I had to work the next day so I had to wrap things up. I went to look for my gal who I thought was outside having a smoke. When I opened the door, I see my boys fiance locking lips with another dude. They didnt even see me. I ducked back in and thankfully found my gal standing right behind me. I sent her out to break it up.

We grabbed a cab home with drunken friends fiance who was extremely wasted. She had no idea what she had just done. I decided to play dumb until I could sort it out with my woman.

This is a damned if you do damned if you dont situation. I feel that being drunk is not really an excuse. Then again, I really don't want to expose this if it was a mistake. They are very happy together and I love both of them. But, i feel that keeping this from my friend would be betraying him but by telling him, my fiance may be betraying her best friend.

HELP!

So now you know the situation, here is my side of the story.

My friend knows I saw her but does not think anyone else did. She does not remember it all. She didnt even believe me when I told her. She as CRUSHED and has been crying for 3 days. She made me promise that I would not tell my man but little does she know, he saw it firsthand.

I did not recognize the guy so I feel as if it would not get out through any other source. However, I feel that she truly made a mistake and we should leave it at that. She was totally not herself this day. The excitement in this city was higher than it has ever been so I think we all just got a little carried away.

I think we should let the two of them sort it out and pretend we know nothing.

I'm pretty sure that we are not the only ones that know about this. The guy she hooked up with had to know someone at that party and may have said something. I would rather him hear it from her than us but the worst would be if he heard it from someone else. If he did, we would all look like we were betraying him.

I have been friends with this guy since the day we were born. He would expect me to say something. If it breaks them up, maybe it was all for the better.

This WILL not get out. I do not want to even think of what it would be like to ruin their relationship and never see either of them again.

This was a stupid mistake that was made on a very drunken night. The remorse is there, the heartache is there, we do not need to do anything else.

The lesson has been learned. Lets leave it at that for all of our sakes. Some things are better left unsaid. End of story.