Help please!

My 8 month old has bed shared with me his whole life but recently he’s gotten to the point where he wants to be held even in bed (laying on my chest and patted/rocked to sleep) His naps during the day are usually on me too. I really want to start getting him in the crib so i can get things done while he sleeps but he cries so hard when I lay him down in it. Once he dozed off I lay him down in it then boom he’s awake and cries for me to hold him. I love the snuggles but I never have time to myself. :-( what can I do to help him transition? It’s so hard