Oh my gosh, is he cute! My cats love fleece. If I'm wearing a fleece sweater, my older cat sucks on it while kneading on me. The younger one does a quasi-sexual kneading on fleece blankets, while sucking on a corner of them!
I'd find a smaller, cheap piece of fleece at a fabric store, and pull it out for your kitty when you go to bed. Maybe you can train him to stick to his own blanket. Good luck...
Put some catnip on his blanket for a while, and see if that gets him in the habit of using that one instead of yours. Keep his in the same place. Cats are creatures of habit after all. (Just a wild idea, I don't know.)
My cat is 12 and guess what not broke of licking the fleese. And I agree with you it is gross to wake up to a wet spot on the blanket. I have tried everything to get her to stop and she starts out with her blanket then ends up with mine, gross. So solution is no more fleese for me until cat is gone on to heaven. Yes she has her own fleese blanket just for her(spoiled rotten cat). Oh well not spoiled just well loved.