My boyfriend wants to get rid of my dog! 🐶 [23F] or [24M]

To keep it brief, I've been in a relationship for over five years. My boyfriend (24) and I (23) are planning to buy a house soon and have been living at my parents' place for two years to save money. In September, my parents and I went searching for a dog to keep theirs company. We found a Havanese puppy living in terrible conditions—only three months old and left outside in the cold. He was dirty, his food bowl was filthy and empty, and his cage was soaked through. My parents decided to adopt him, and we brought him home, gave him a bath, and started feeding him puppy food. Now, in March, this little guy has become incredibly attached to me. He follows me everywhere and waits for me to sit down. He’s a great puppy, but he does have some quirks: 1) he barks at night, prompting us to close the curtains, or else he starts barking outside; 2) he barks at any noises; 3) he growls when eating his treats; and 4) he recently started peeing indoors out of the blue. I take him out almost every hour, but he still manages to go by the corners of the tables. Recently, my boyfriend came home early and found pee and poop on the carpet, which is rare. He told me he won't let me keep the dog and that I have to choose between my puppy and him. I love both of them, but my puppy has brought me so much joy, and I can’t bear the thought of him being sad without me. He waits at the door for me when I go to work, showing just how loyal he is. What should I do? 🤯