Just need some support

My little boy is 3 weeks old today. I got to nurse him for the first week and then needed to use supplements. I had to start pumping to see how much he was getting because he lost right at a pound within the first 3 days. They had to keep us an extra day at the hospital due to it. We ended up switching to formula when we got home because I pumped for a couple more days and it felt more like a hassle than a blessing to feeding my sweet boy. I have been feeling super sad lately and I have a feeling it's because I stopped breastfeeding (I just loved the connection of it.) How do i overcome this feeling!?!?