You understand how hard it is to keep him from being hungry, right? Not only is he picky about who he eats from, those people have to be willing and able to deal with him being a pervert, and even then he tries not to take too much. Which means he needs a lot of meals. Then after you come over, all those meals are completely drained. And you're not the only vampire he's taking care of like this.
You can't keep using him as a filter. He loves you too much to turn you away completely, you understand that right?