6 months exactly. I always had supply problems and had to top up and spent $1000s on lactation consultants etc. then we both got hand foot and mouth - he couldn't feed, I couldn't eat (I had to eat about a million calories a day when BFing) and my supply just completely dried up.
I'm sad I couldn't do it longer, but honestly, it was so hard, and tiring and painful that I'm just glad I made it to 6 months.