Wes, I feel you, I truly do! For me it has been only 2 weeks since the BD so I get the raw emotions, but as you admitted, the other posters are right. I've struggled with being weak myself. I've always been a doormat and when you're in crisis mode it is easy to become an even bigger one in an attempt to save your M, but it does the exact opposite.
Take it day-by-day, and breath-by-breath. You're learning, you'll make mistakes, but just make sure you learn from them and grow from them. You'll be okay and so will your daughter, it just takes lots of time and patience with ourselves.
Me: 35 W: 32 MR: 2y T: 3.5y SS11 BD: 11/3/16 EA: 10/26/16 PA: 11/11/16 W asks for S/D & ILYBINILWY 11/13/16 Status: I moved out 11/19/16, GAL I filed for D: 12/14/16 D-day: 3/10/17