Why don't you want to?
When I was pregnant I didn't want to either, I felt a bit weird about it, I now realise that my issue was cultural. It's because in our society sexualises breasts for the male gaze. My mother kept telling me I should at least do it in the beginning and it was the best thing, I was bf for 4 weeks before my mum introduced formula before she went back to work when I was 6 weeks. I literally knew nothing about breastfeeding and started asking women if they bf and how long for, one of the first women I asked said she "only" bf her son for 6 months. I was so shocked, I recall saying "wow that's a really long time!" Thinking she was a bit of a weirdo if you can believe that
I decided I should try really, but wasn't particularly concerned about it. I was more consumed with the birth. But I did start having dreams about breastfeeding my baby, perhaps my subconscious trying to help me find it normal?
One thing that really shocked me was when she was born, how much I desperately wanted to breastfeed her. I was very fortunate that with help from my midwife (who very luckily was trained in breastfeeding, most aren't!) and my DP (he helped so much with the positioning) we got the hang of it. actually went to give her formula in the middle of the night on her second day and the smell was horrible to me and I couldn't give it to her. I hope that last comment doesn't upset anyone, I'm just sharing my thoughts and feelings at the time, I was formula fed myself and I'm very healthy adult.
Anyway, I share this with you because IMO it is worth learning more and considering breastfeeding more, you don't need to make your mind up until baby has arrived. A choice is only really a choice when you are fully informed and really it's worth considering carefully the reasons why you don't want to.