Baby takes up so much time and energy

Hi mummies, first time mum here and baby is around 3 months old, fully breast fed. I love my baby but there are times when I feel so exhausted and I don't have time for anything else at the end of the day. My mum is helping me out but baby still refuses to take the bottle which means I have to breastfeed him every two hours or so. Any tips on how to be more efficient in caring for baby so that I can get a bit more rest and have time for other things?