May I ask why you are exclusively pumping? Latch issues with baby, perhaps? Knowing why you are exclusively pumping might help us help you a little better because I wonder why can't you just breast feed directly from your breasts? I can totally understand if you were pumping to maintain supply issues, and for that reason alone, I totally understand the demand. I breastfed my current nursling, from day one, but I also needed to pump to increase and maintain my supply because my nursling had a weak suck, which would have affected my supply had I not pumped. I pumped for 12 months. I know firsthand how exhausting this is. But after 12 mths, my supply was very well established and my baby's suck had improved so much so that she is now 19 mths and still breast feeding. So, even though I gave up pumping, I am still breast feeding and I wonder why can't you do the same.
As for the guilt you feel about not pumping, I also felt guilty. I had been doing it for so long that not pumping anymore felt like I was somehow missing out on something. It's a strange and mixed emotion but again, I wasn't exclusively pumping. I was also breastfeeding but using the pump to increase/maintain my supply.
IF you can breast feed, I would encourage you to do that because at least your are still nursing. Good luck with whatever you do. 7 mths is a milestone and you should be so proud of yourself. : ) Most women give up and it's hard work but you know firsthand how worth it it truly is.