My baby is nearing 2 months shld I feed him or demand or every 2 hrs once ?

A. I feed my baby on demand. Like every 2 to 3 hours she cries so I feed every 2 to 3 hours in the day time and in night she sleeps even for 5 to 6 hours but I make sure that I seed her by 5 hours not more than that also day time I feed her more than usual and night has eyelet her to sleep for 4 to 5 hours at a stretch and she is doing good absolutely