Good morning everyone 
Ok, lots more replies since I went to bed last night, thank you for all of them.
I'm sorry if my original post sounded confusing, I'll give as much detail as poss, as the men's opinions have thrown me a bit.
Oh, and apologies if I sound a bit schoolgirl. This isn't someone I'm losing sleep over or anything, I was more just a bit perplexed!
There has been obvious chemistry between me and man for the last two years when we've met. I have been in a relationship for that whole time but that is now not the case. I also have gone on Facebook a bit more in the evenings, feeling more sociable etc.
Man pops up on Facebook chat. We both admit we've liked each other for a long time. He asks to meet up with me, I say perhaps but would it be weird not to mention it to his brother who we're both close to.
He says it's up to me, he sends me his number and I say perhaps we should do something in the New Year. I send Facebook message on 29th, text on NYD and not heard since. I now have to see him next month at his brother's 30th.
His brother and I do not have any underlying chemistry and his brother is also, I think, still in love with his ex.
Anyway, I am not going to contact him again. He could well have met someone else which is fair enough or he could just have changed his mind. I'll see him at the party and be cool but friendly enough.
And, I will update 