M.B.
definitely sounds like you want to continue to breastfeed. keep in mind it is so possible and with the right information and support, you can do it.
breastfeeding is very different from bottle feeding. the flow of the milk is different and the muscle mechanics that baby does is different too.
breastfeed your daughter as soon as you can when you get home from work and right before you leave.
find information on the risks of formula feeding and educate yourself and your boyfriend.
research the cost of formula feeding (anywhere from $1200-$2300 for the 1st year).
find other things that your daughter and her father can do to bond--dancing, bathing, singing, story time, cuddling skin to skin just to name a few.
if she decides to self wean, you can still give her pumped breastmilk. if milk supply is not an issue, you might want to consider pumping for a feeding and let daddy bottle feed. just be wary of how this effects your milk supply.
here are a couple of websites to look at.
drjacknewman.com (the site is currently under construction)
http://www.drjaygordon.com/development/bf/worknursetips.asp
http://breastfeedingmadesimple.com/bms%20new%20home%20pag...