I just went through this about two weeks ago
My little guy cried forever, he sounded lke he was dying and disrupted life and worst of all he was right next to my bed.
I sat next to the gate shoved him in one or two times a day and loved on him a LOT (feed treats if thats something you do), he eventually found out that I wasn't always going to leave him alone every time, I would come back eventually and his crate was comfy after all.
He loves it now and every night goes in at 9 (by himself) then I come in at 10
he'll spend a whole day in his crate if he has to.
Good luck!

My little guy cried forever, he sounded lke he was dying and disrupted life and worst of all he was right next to my bed.
I sat next to the gate shoved him in one or two times a day and loved on him a LOT (feed treats if thats something you do), he eventually found out that I wasn't always going to leave him alone every time, I would come back eventually and his crate was comfy after all.
He loves it now and every night goes in at 9 (by himself) then I come in at 10

Good luck!