Hi M.,
It sounds like you have a very smart baby. Please listen to him because the statistics of the of benefits of breastfeeding for mom and baby are amazing. Here is a link to a body of research called Outcomes of Breastfeeding Versus Fromula: www.lalecheleague.org/cbi/Biospec.htm
I noticed that you mention that you do not have enough time in the day. Your son is blessing you by slowing you down so that he can nurse. Soon enough he will be big and no longer interested in nursing. I know that time has gone quickly for my boys who are now 12 and 16 years.
I don't know if this would work for your life but, sometimes cosleeping and nursing on and off through the night helps some mothers and babies. You can find information about this at http://www.askdrsears.com/html/10/t102200.asp or the Mother-Baby Sleep Laboratory at the University of Notre Dame
www.nd.edu/~jmckenn1/lab/
James J. McKenna, Ph.D. is a Professor of Biological Anthropology; Director, Mother-Baby Sleep Laboratory, University of Notre Dame. They provide extensive information regarding co-sleeping.
For Frequently Asked Questions about cosleeping check www.nd.edu/~jmckenn1/lab/faq.html#safesleep
I hope this helps.
Good luck,
R.