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Appearing on the Today show for his first public appearance since the accident, Morgan sat clutching a cane and became emotional as he recalled learning that his friend and fellow comedian, James "Jimmy Mack" McNair, had been killed.
Morgan then came across a video of McNair's funeral on YouTube, and "I lost it for about a week," he said.
Asked what it's been like emotionally since the June 7, 2014 accident, Morgan replied, "Up and down." He said he had his daughter, son and fiancee, Megan Wollover, "so they keep my spirits up."
"But the pain is always going to be there for Jimmy Mack," he added, his voice cracking and his eyes welling. "He was a loving man, a warm man, he was a good man. He's gone. That's it."
Morgan also posted on Twitter for the first time since the accident, thanking his supporters.
It's been a year. Just wanted to say thank you for all of your love and support. Will see you soon.— Tracy Morgan (@RealTracyMorgan) June 1, 2015
Last week Morgan settled a lawsuit with Wal-Mart, which owned the truck that slammed into the back of the limo van carrying him and others on the New Jersey Turnpike. Morgan suffered head trauma, a broken leg and broken ribs.
"I'm happy that Wal-Mart stepped up to the plate in a tremendous way," he said. "I'm happy they looked out for Jimmy Mack's family."
Morgan typically traveled with his family to comedy performances but chose not to bring them to the appearance in Delaware he was returning from when the accident occurred.
"I told Megan, 'You and the baby (daughter) stay home, and we'll go to Delaware, and I'll be right back," Morgan said.
Speaking of his own continuing recovery, he said, "I have my good days and my bad days, where I forget things. There are times where I get the headaches and the nosebleeds, and I won't even let my lady know because I don't want her to be worried about it."
Asked if he hopes to get back to performing, he replied, with a tear streaking down his cheek, "I love comedy. I'll never stop loving her. And I can't wait to get back to her, but right now, my goal is just to heal and get better. Because I'm not 100 percent yet. I'm not. And when I'm there, you'll know it. I'll get back to making you laugh. I promise you."
The Associated Press contributed to this story.