Why can't I only feed?

I am so sorry you are having so many problems with feeding. Sad as it is, some women just can not feed. It's nothing you have or haven't done. Just keep trying and supplement with the formula. Maybe all you need is more time. If you (or the baby) gets to frustrated, there is nothing wrong with switching to formula as his main source of food. I wish I could help more. I've been there. But there wasn't anything I could do either. I fed my kids (all three) for at least a month before it got to the point where their health was being affected. Don't feel bad or beat yourself up if you can't do it!