Dont feel like you have to BF, I know their is a lot of pressure on women to breast feed these days, with all the talk of it bosting immune systems and being so much better for the baby. I know a lot of places really give you a hard time if you say you want to bottle feed, but it really is your choice and nothing you should feel forced to do. Right through my pregnancy last time I planned to breast feed for 6 months. got an expresser and went along to an evening class run by the miswife on how to breast feed, was all prepared, then when I had Noah I got a spinal headache from the epidural which confined me to a bed for 10 days, I couldnt sit up or even tilt my head to see what I was doing or if he was latching on properly, in the end I had to give up and bottle feed, which really upset me and made me feel like a falure. However Noah got on really well with the bottle, OH was able to share some of the work (and the night feeds) and we were even able to go out and leave him with family without worrying about ahving to express milk. He has never had any illnesses and infections even a cold! he has always maintained a good weight and never had any problems at all.
So all I would say to you is by all means plan what your preference is and be prepared, but if it doesnt work out for you, you cant do it or you dont enjoy it dont feel bad about bottle feeding. I think whats most important is that you enjoy the experience and are relaxed. And if your finding breastfeeding is to tiring, painfull, hard work, then dont feel like your obligated to do it.