If you look back a couple of months, I wrote an almost identical post! I felt the EXACT same way as you, hon! I totally get it. DS is also my second LO, and i felt the same way about not spending time with DD because I was always feeding DS. Or worse, it got to a point where i had to start feeding him in a dark, quiet room because he got so distracted, then I was never seeing DD. I also felt (and still do) so guilty and sad that it wasn't working this time. I BFed DD until 10 months, so I just figured this would be the same. And I hate that I couldn't make it work this time.
I got to a point where between hating it, pumping at work, DS's reflux, and DS's lack of sleep, I just had to give it up. It was sad, and I still feel guilty about it, but I have been SO much more sane than I would've been if I had kept pushing through. DS is 6 months, and still not sleeping well. Being able to trade nights with DH has been a life saver and a marriage saver!
There are definite pros and cons to both FF and BF, and you have to make the decision for what works for you. I know that for me, it just got to the point where I was making myself (and probably everyone around me!) crazy trying to "make" it work when it just wasn't. Good luck, hon! We've got your back no matter what!