Or you just stop doing this?
Ok don't make her think she is the center of your world! She shouldn't be anyway!
Just give a break and don't get to the opposite side! Do be a busy man, Do have priorities greater than her, but she exists in your kingdom too! You have let her in, give her some attention!
For example, if you make her feel for 1 time that she is special, no gifts no love talking, just make her understand that you have a nice time while being around her she would stop asking staff like that, while knowing that you are a busy man and she is not the 1st priority!
Everything should be done within some logical lines! Don't pass those lines or you'll get the wrong conclusion...