Missing my baby today more than ever! Today was my due date :(

I've been up for 3 hours and crying for the last 3 hours :( My baby JJ was born at 24 weeks in July and suddenly passed away September 15th, 3 weeks before he was supposed to come home from the NICU. I spent every single day with him in the NICU for at least 8 hours a day. I'm so thankful for the time that I did get to spend with him but I miss him every minute of every day. I miss holding him for hours. I miss holding his hand. I miss kissing him. I miss his heart warming smiles. I miss his sleepy yawns. I miss all his little facial expressions and how excited he got when he first heard my voice in the mornings. I miss everything about him. How can I get through this pain and get back to having something to he happy about again. My husband and I had been TTC for 8 years before we found out we were 7 weeks pregnant in March. He was the best thing that had every happened to me.