Both of mine eventually stretched out to around the 3 hourly mark some time in the first 8 weeks or so.

DD was a bit tricky, very content baby who rarely cried or fussed even when she was hungry so I would always feed her regularly rather than trying to catch her cues, seemed to work for us and like I said, we eventually just settled into a rough 3 hourly pattern.

If you find that feeding roughly every 'X' hours works better for you both then go for it - I remember with DS we went through a stage where i think I was feeding him too often and he ended up unsettled and a bit refluxy, same thing happened to a mum in my baby bellies group. When we stretched the feeds out a bit longer, they were much more settled.