Breastfeeding Burnout

Is anyone else burnt out with breast feeding? My daughter is 5 months and up until 3 weeks ago I breastfed exclusively. I got sick, however, and after that my supply just kinda dropped. I tried pumping and such but we had to supplement with formula because she was still hungry! Life has been so much easier giving her a bottle at night. Her dad gets to bond with her and I get a break. But my supply never built back up. I am producing less and less. She seems so uninterested in nursing. Even before supplementing she was wiggling and moving around and getting distracted and wanting to play. It's so much worse now. But with the bottle she focuses on eating. I've tried the dark room no distractions. She just doesn't want it and I feel like I'm forcing it. A part of me wanted to breast feed longer but at this point I'm so burnt out. I just feel so guilty!

Sorry for the rant. Is anyone else going through this too? =(