Pumping depression

Feeling so depressed. My baby boy was born on September 19 and since he was a month early he ended up staying in the NICU for 2 weeks and drinking breast milk from the bottle. Since he has been born I have pumping every 2 hours. I feel discouraged, I know baby can latch on the breast but sometimes he won’t and it takes a long time. I hate pumping, I feel guilty because as soon as my baby is done eating I have to put him down so I pump. I feel like I don’t get to enjoy my baby r enjoy the bonding part of breastfeeding. But when I think of switching him to formula it makes me so sad because I know breast milk is best for him and I want him to be healthy. Sorry for the long post, but I just feel so torn and wonder if anyone had been in this position? What works for you? Exclusively pumping just really doesn’t seem sustainable in the long run. I’m already starting to barely keep up with him.