OKay, this is the (long) sitch:
My DP has a lovely brother, who is single. He and my DP are v close (as brothers should be) and the BIL has expressed a desire to find someone nice and settle down. However, he is a)picky and b) quite shy with the ladies, and so has been single for the past few years.
Enter my best friend. She is lovely and newly single. I had never considered them as a potential couple, (she is an extremely driven, fiery and pro-active country girl, he is a laid-back, sweet-but-not-assertive, city pidgeon) but they met, and my friend expressed to me a desire that BIL should ask her out. I was surprised, but passed on the message, he duly did, and they went out. My DP and I made a pact that we would NOT pass information between the two of us, - I would keep my friend's secrets and he would keep his brother's, and we would NOT discuss it with each other or act as a route of communication between the two lovers.
The date went well enough to result in bedroom action, and BIL has spent the time since mooning about the flat in a lovestruck daze. Meanwhile, best friend has told me that she 'isn't sure' if she likes him, or if she just wants him 'as a friend'. In my experience, this is a bad sign, - you know if you like someone, and 'not being sure' means that you aren't that keen. So I was expecting a saddened BIL when he heard the bad news.
But now he says that she has invited him to stay with her for the weekend. I have a strong feeling that best friend is not behaving well, - she is a little bit naive about how dating works, and can be a bit wishful about how the world is, ie: she is very good at convincing herself that the world is the way she wants it to be. She enjoys his attraction to her, (who wouldn't?) and likes the idea of going out with him, but isn't that keen when it gets down to it. I think she has fed herself this 'just as friends' line, and thinks that that is how he sees her too, to make everything ok. When he doesn't. I fear he is riding to heartbreak.
So, should I:
a) Give my friend a firm talking to about being clear with people about how you feel/not messing people about?
b)Tell BIL not to get his hopes up/encourage him strongly to have a clear talk with best friend about 'where this is going'?
c)Just leave it well alone, and risk BIL's bitterness with me that I introduced him to a heart-breaking harpy, and best friend's irritation that I've embroiled her in a messy breakup?