2 months old male fawn puppy very sad depressed shy and stubborn

I have a 2 weeks old male fawn pug puppy(prince),he is been very quite quite and shy and avoiding people around him and he is just all time being at one place and his stubbornness is increasing day by day when it comes to feeding food all time we have to hand feed feed him still he try avoiding and also during walk and going out he is stubborn.even I got him checked from vet he said just doing fine but he seems sad and depressed these days ......anyone please suggest me some advises to keep him happy and loving ?????