I regret getting a puppy and I don't know what to do.

I know you seem okay with your decision now, but you need to put a lot of thought into this commitment. If you want to get the puppy into a loving home that is ready for it, I suggest you bring her to a shelter, as puppies are adopted nearly right away. If you wait too long and decide later that you don't want her, it will be very difficult to find her a new home as people don't typically want older dogs that already have set habits and attachments. Plus, it will be harder on you if you form an attachment.

As I said, I know you seem okay with the decision now, but if you find yourself constantly changing your mind, you need to give the puppy up. You need to stress to your boyfriend the points I have made above and let him know how you feel about how your future time commitments will impact the time spent with the dog. Don't worry about the puppy getting adopted at a shelter, like I said, people always want puppies. If you plan to keep her, I just hope you can really commit and give her the love and attention she deserves. Good luck!