Advice on what to do

My boyfriend (22) and I (20) moved out of my parents house into a 1b 1b apartment its cute and cozy. I always knew I wanted my own dog or at least a pet but I am 100% regretting this decision. We had less than a month in this apartment alone before we decided to get a puppy about two weeks ago now. I brought up the idea first which he shut down but then he said it could be a good idea. My thing is I wanted to adopt an older dog from the shelter or foster homes. He did not want to do that and wanted a puppy from a breeder and I should have listened to my gut. I’ve always wanted a pitbull from the shelter bc I have had them my whole life with my parents. He specifically wanted a golden retriever something I have zero experience with. I was naive and helped us find and connect with a breeder. I just wanted my own pet for once and rushed into this decision with him. My boyfriend does roofs and sometimes does not get home till 7-9 PM, I get out of work around 5 so I usually have the puppy on my own and it is horrible. I had one day to myself at this apartment where I had nothing to do, no unpacking or cleaning and I feel like this was a big mistake. I do always take care of the puppy preparing him freezebones and enrichment etc but the thing is we live on the second floor and have steep stairs I’m not able to carry him outside a lot as he is already almost 30 pounds at 3 months old. With my boyfriend being gone a lot its hard for me. I don’t think we can handle this puppy because for some reason my bf has the mind set that if he takes the puppys water away at 7, that he shouldn’t have to bring him outside in the middle of the night mind u this whole time he never has done that and I’ve had to resort to waking up myself and bringing him to the puppy pads. In the mornings my boyfriend rushes to go to work and leaves me to feed the puppy play and have him go potty on the pad bc he won’t take him outside since he’s in a rush. I also have to get myself ready for work too. I don’t know what to do at all and I just want to have my freedom back. I work full time to save money to open my own beauty suite and now having a puppy I feel I’ll never be able to accomplish that. Its hard to work on potty training and training this puppy on my own and him not taking the puppy outside doesn’t help at all. I also do most of the cooking and cleaning. I’m not saying my boyfriend is a bad person by any means but I think we are both overwhelmed and its putting a strain on our relationship. When we are both home with the puppy its a lot easier but thats not realistic when he works everyday and weekends I have off so I have the puppy all day myself. So even on my days off I’m not able to do anything at all. I do love and care for the puppy but I miss my life and I just moved out and already have to care for another human being essentially. This puppy also came to us having giardia from his breeder which is another thing to add onto stress.