I have a friend who I have known for over ten years. Until recently I would have described him as one of my best friends - he's helped me out with work, provided a reference for me, got my partner a job, made me godmother to his child.
Years ago we had a drunken dalliance which I was a bit uncomfortable about but it was, on balance, consensual.
We had agreed it wouldn't happen again. Now fast forward to present day and I got in touch with him and a select few of my other best friends because partner and I have been having some pretty epic problems. He offered to meet me and hang out for a chat.
We met up and he proceeded to buy me several glasses of wine, while staying completely sober himself. Then he started touching me, and tried to get me to give him a blowjob. I felt pressured and uncomfortable, but did touch him briefly, before getting him to drive me home.
The key factors for me are that he was sober and I wasn't, and that he knew I was feeling extremely vulnerable because partner and I had been having problems. Another male friend said it sounded like a pre-meditated plan to get sexual contact, and said he was angry on my behalf.
In retrospect though, I'm beating myself up because we were discussing sex and relationships, he was quite obviously trying to get me alone and I did let him buy me drinks.
So I really don't know how to feel about the whole thing.
However I did all that because we've been friends for 10+ years and I thought I could trust him.