My boyfriend doesn't like my dog, but I think I'm going to refuse to give it up.
What do you think you will do about the situation?
I'm thinking of breaking up with my boyfriend
While ending a relationship is hard, you did take up the responsibility of the dog and now he depends on you. So you are probably doing the right thing if you end the relationship, since you don't have much of a choice.
It's not fair, it's his fault for not caring about dogs...
I know the situation is not fair, but it is your boyfriend who is acting unfairly by refusing to accept you and your dog.  The dog is your responsibility, and a family member to you.  Anyone who loves you should also care about those closest to you.