Unfortunately a lot of books are very misleading and misinforming when it comes to the normal course of breastfeeding. Which ones have you been reading? I'm going to hazard a guess at What to expect - the First Year, The Contented Little Baby Book, The Baby Whisperer and perhaps something by Claire Byram Cook.
I'm not being mean but if it is any of those books and not books like The Womanly Art of Breastfeeding, The Food of Love by Kate Evans, The Ultimate Book of Breastfeeding Answers by Jack Newman, then the books you have been reading have not got great advice or information. I made the mistake of reading TCLBB and my DH was so appalled at the 'information' on bfing he throw it in the recycling!
It is VERY normal for a baby of 6 months to wake in the night to feed and to need feeding frequently during the day even if on solids. You wouldn't expect a 6 month old baby to be taking enough food to majorly alter the amount of milk they are consuming breast or bottle fed and equally it is very normal for a baby however they are fed to want to be close to mum and feed a lot especially in the early weeks.
Not all babies feed every 2 hours 24 hours a day but the occasional one will do, it may be your friends have just all got ultra-frequent feeders - nothing wrong with that
. There is a good set of charts to show how a newborn spends it's days here so you can get an idea of what the first couple of weeks might be like.
A newborns tummy is only small and they need very little but very often. Wearing baby in a sling can help a lot as can getting out in the day even if you end up feeding whilst out - it's a change of scenery to the sofa!
Sometimes we, as parents, need to adjust our expectations of what life with a baby is going to be like - it's a darn sight easier to adjust that than to adjust a baby with it's millions of years of evolution telling it what to do (stay close to mum, keep feeding, feed in the night so the tigers don't get me, cluster feed in the evening so mum doesn't put me down just when the predators are getting up and are hungry!).
It may seem like life with a baby is unrelenting but the more 'with the flow' you are the easier it is, it doesn't last forever and it'll be easier before you know it. Time flies with a baby - I should know my eldest daughter is not quite 5 years old, my middle daughter is 3.2y/o and my 'baby' is 16m/o and it seems like yesterday DD1 was a tiny baby let alone the 'baby' being a baby.
Good luck with the rest of your pg and enjoy what sleep you can get 