OP, I know EXACTLY how you feel. It feels like I wrote your post.
Firstly, I am pro breastfeeding. I wanted to do it more than anything.
But I have had 2 premature babies (32 and 33 weeks), born too early to breastfeed, so I expressed milk. I never managed to get breastfeeding to work for us.
My DD (2015) had exclusively expressed milk for 7 months. I am very proud of that. I’d put that achievement high on my life achievements. But, it was hell. I had to express when she was sound asleep, so Daddy did most of her feeds as my expressing times never matched. I couldn’t wake for both. I would have to go and pump in random places, again, taking me away from DD. And I’d have to leave her screaming whilst I expressed. I found it frustrating. It also limited when we could go out - I’ve expressed on benches, in bus shelters, in the car. It was hard.
I then got PND when I stopped expressing. Probably a mixture of hormone issues and also, I pushed myself too far.
I had DS in October last year (he’s 6 months now). I expressed for about 3.5 months and stopped. I did not want to battle through expressing again. I looked after my mental health this time, I wanted feeding to be a positive experience.
I don’t feel guilty. I did my best. I’m happy, and so is DS. I’ve made the right decision for me. But I only reached this mindset after my second baby. First time round, I was literally distraught about not being able to breastfeed.
Best wishes with whatever you decide. But I think nothing is more important than “Happy Mum, happy baby”. They are only babies for such a small amount of time, you want to look back on it all fondly. Lots of love to you xx