I think it's normal. We had a great birth but he was a terrible feeder so I only BF him to 3 months. I get the same emotional pangs whenever people talk about BF. my plan was a year and I kinda mourn the loss of that experience. My girlfriend was going on about how easy BF was for her at brunch yesterday and I had to walk away.
So I guess we all have things that don't go to plan. Maybe celebrate the great things. The things that surpass your expectations. I found the love bubble of a newborn so intensely beautiful and surreal. That's my favourite bit of the whole experience. Not the feeding or the birth, just getting to know my little man and seeing us as new parents and the falling in love.