D.W.
Here's the thing with a breastfed baby-they've got to get their nutrition in. If baby is getting some good sleep at night then they have got to make up for it somewhere right? So they will eat more frequently during the day. Perfectly normal.
Also, is this happening more toward late afternoon/evening time? Perfectly normal. Around that age both of my EBF babies would nurse non-stop it seemed but what I learned is that they are actually tanking up on all the fatty hindmilk and then they can crash out and rest for several hours.
3 months is also growth spurt time. This is baby's way of getting your body to make what she needs for this next round. Beautiful and perfect the way it works!
The absolute *best* advice I can give you is to be confident in your ability to feed your baby and follow baby's cues/lead. If you do this you won't go wrong!