No reply from the OP.
Unfortunately sometimes people don't make the best decisions. OP may think her bf is perfect, but come on, nobody's perfect. If she gives in to his ultimatums we all know what the future holds.
But we can also look at it from the dog's point of view. How would the dog feel with the bf in the house and getting all the negative energy from the bf. The dog would not be happy. If she were to surrender to rescue, a foster home and eventually a perfect forever home would be in his future. That is exactly how I came to have Toto. He was an owner surrender. She was pregnant and newly married. The husband TOLD her to get rid of the dogs. The other one is Safari (which I know some of you are familiar with Safari's story). Now Toto is in a good forever home and he's the funniest, most animated and loving yorkie out of all the fosters we've had.
He was not properly trained either. He peed a lot in our brand new house. I mean brand new as in just finished building brand new. We worked with him for several months and now he's better but still not 100%. It takes work, a lot of work! But I'm so lucky to have him.