so my boyfriend got me a yorkie for xmas

when he was 12 weeks old. it's been almost month and still hes not active

. i want him to play around or explore the house at least. all he does is sit at the corner somewhere. he will play sometimes but lazily like he wouldnt move out of the spot that hes in and i'd have to go over to him. i tried to take him out for walks but it seems that he doesnt like me taking control. all he does is cry, if i leave the room with him still in there he'll try to follow but stop after like 3 steps and cries. so then i'd have to over to carry him out of the room. what should i do?