Yes, they all buddies in real life and thats one of the reasons why this show is so successful.
The reunion show is just a rumour. Read this article:
'Friends' reunion rumours smashed
Tuesday, January 24 2006, 12:49 GMT -- by Fiona Edwards
Rumours of a reunion of the cast of Friends have been denied by the show's producers.
Rumours had been circulating on the internet about a short revival for the hit sitcom which was to feature four new episodes. The six main cast members were said to have signed multi-million dollar contracts to do the shows.
Attached to this rumour was speculation of another spin-off series starring David Schwimmer, Matthew Perry and Matt LeBlanc entitled "It's a Guy Thing".
However, a spokeswoman for Warner Bros insisted there were no plans for any new episodes or spin-offs: "There is absolutely no truth in it - it's all rumour.
"There is nothing planned of any kind."