You have to be happy in yourself and make sure you aren't putting unnecessary stress on yourself. That said, yes, breastfeeding is hard work and takes a lot of commitment, esp in the early weeks, but the rewards are huge and I promise you, IT DOES GET EASIER.
I was lucky not to suffer sore nipples, but what I found incredibly hard, was the fact that you didn't know. Had no idea how much baby was getting etc etc. The fact that the baby is attached onto you so much is to tell your body to stimulate milk production. In a few weeks, that will get better. Do you have help/ support around you? I found this invaluable. My mum and hubby were amazing and did EVERYTHING for me, so all I did was sit on the sofa relaxing with a cup of tea and trying to learn how to feed. It is also a chance to be close to your baby. I literally came downstairs in the morning, sat on the sofa all day whilst people ran around me, and then went up to bed in the evenings with the baby!! I was so lazy! But I think without the support it would have been so much harder.
Also, expressing, esp in the early weeks, is no indication of how much your baby is getting. I remember getting quite distressed in the first few days, saying I couldn't see ANYTHING dribbling out of baby's mouth, there was nothing coming out of my boobs, and convinced I wasn't producing anything. However, just trust your baby, trust your body, and if your baby is latched on correctly, then things will start to feel natural.
Also, don't be afriad to call your midwife, HV and demand a home visit. I didn't need to do this, as I had my mum who jollied me up when I was down, understood my hormones, but I have recently requested this for some sleep help. Don't be afriad to ask for help - how else are we meant to know what we are doing?
As with anything, the hard work pays off, and as the baby gets older BF becomes even more lovely as they start to interact with you as they are feeding. I do think there is too much of a concentration on tiny babies sleeping long hours together when they are little - remember they have only just come out of you!
BUT, you must be happy, and try and rest and relax. If bottle feeding is a choice you make, be happy about it
Hugs xxxx