All big dogs need exercise and some way to channelise their energy and have something to do. Your dog is still a puppy and needs love and attention and someone to play with it and also train it in basic obedience. Its still not too late.
Since you live in an apartment you can fix up with your guard of the apartments or block to take your dog for a good walk morning and evening or your maid can do so also and give them a little extra for incentive. You will also need to do basic obedience training if you have not done so. Otherwise get a trainer. Do not keep him chained in the apartment and keep him open, but only after he gets his proper walks and someone is around as pups can get upto mischief, otherwise he can take out his boredom on furniture etc.
I dont think he will get more attached to the maid as long as you spend time with him after work and take him to the park etc and play with him on your off days or on sunday. Even after dinner you can take him every day for a walk. Otherwise what I see in the future is an unmanageable dog because of the owner and later it will be very difficult to get rid of bad habbits once formed.