Don't ever do a wedding, even your best friend's. Only do it if you are a wedding photographer and are being paid, and preferably don't know the couple too well.
Say no if your friends ask you to be the official photographer. You won't enjoy the wedding at all, as there will be too much pressure to be out snapping. If the pics turn out badly, and they often do, they'll be a simmering source of resentment for decades.
Take your camera, enjoy the wine and get some great shots but leave the pressure of doing it right, to someone else.
Well that's my two cents.
― Proger, Sunday, 10 June 2012 16:33 (ten years ago) link