I agree that you’re not an asshole simply for not wanting a dog. Especially when the reason is that you don’t feel you can give a dog everything they would need to have a good life. However, since there is a dog in the picture, you’re going to need to make some compromises on that front.
You mentioned that you don’t want to have to divert your plans to let the dog outside, or take her for a walk. Are there any other options? Once the dog is trained, could you and your boyfriend afford a dog walker to take her out when you can’t/won’t be home for stretches of time? Is there a yard in the picture, and would it be secure if you put a dog door in? (If it’s sliding door access, there are dog door panels that you can put in the sliding door frame, so you can have a dog door without cutting holes in the wall, for example. Or if it’s regular door access, perhaps you can take the original door off its hinges and replace with a door that has a dog flap on it, and then store the original to replace if/when in the future you move out.) Once again, the dog would need training here—to learn how she can use the dog door to take care of her business on her own. She’d still need walks, but at least you’d know she’s not having to cross her paws for an inordinate amount of time, and that might allow you to do things more according to your own schedule/plans.
I did mention training with both ideas. Like @Zissou mentioned, it’s irresponsible not to train a dog. It’s also unsafe—for those around, sure, but also for the dog herself. For example, if she gets loose and is running towards danger, like a busy road, you want to be able to call her back to you, or at least get her to stop her forward momentum. You can’t do that unless you’ve already established good communication with her via training. She also shouldn’t be jumping on people, especially when she leaves such severe scratch marks. And breaking objects like laptops is expensive (assuming it wasn’t just a one-off accident).
I think if you frame the discussion that way, that you want to train the dog for safety and peace of mind, it’s a reasonable place to start the discussion. You would both need to be involved in the training. It can’t be one of you or the other.
Also, it’s not the dog’s fault. It’s never the dog’s fault. She also doesn’t sound like an “asshole,” as much as she sounds exuberant, high-energy, and unaware of the effects her body has on the people and things around her. The jumping, for example. It’s sounds like she’s excited to see you, and jumping is the way she has to express that. She doesn’t realize that it’s unwanted and hurting you. With training, you can teach her other, better ways to greet you.
I would also avoid anything that suggests this is your boyfriend’s fault, or phrases that might lead him to believe you’re blaming him for things. I wouldn’t mention the “dogs are reflections of their owners,” for example. I’m also not sure that’s completely fair.
If she’s bouncing off the walls in the house, she isn’t getting enough exercise and stimulation. So hikes are probably in your future—but do what you can to schedule them so they’re not interfering too much with other things. If you plan them right, they might even be nice ways for you and your boyfriend to spend some quality time together doing something, maybe destressing from busy days/weeks, and then they don’t feel so much like they’re cutting into your time as they are a part of your time? I dunno. That’s how I approach hikes. They’re as much for me as for my dog.
You can also work on things like teaching her fetch. Then you can bring her to a park and play with her, and she gets to run and chase and tire herself out and you haven’t made such a time and distance commitment that a hike would be.
Do you or your boyfriend run? (Whether around the neighborhood or on a trail or on a treadmill). If one of you can include her in that exercise—going on runs with her—that would be a great way to give her exercise and time with one of you, or perhaps both of you, without too much alteration in your schedules to include her. If that’s an option, I’d suggest finding a waist-attached leash for the runs. I run with my dog and that makes it so much easier. I have easy access to the leash when I want to guide him a certain way, but I have my hands free the rest of the time.
Etc. I just mean, hikes aren’t the only way a dog can get exercise. Certainly your dog would enjoy hikes, but it doesn’t have to be a hike every day if that doesn’t work with your schedule. Just some form of exercise to help her burn off some of her energy. You can be creative here.
This has become a bit long. Sorry about that. Basically, I think you should talk with your boyfriend about training, and that you can come up with ways to meet the dogs’ needs without totally giving up your own needs. Compromise, creativity, and a bit of flexibility are key.
There’s a jelly on the site who’s a dog trainer, and she’s probably got some good advice on the type of training you should look for. I agree with those who mentioned finding a professional trainer/training class for you and your boyfriend and his (though if you’re moving in together, she’s your dog, too). Not only will a good trainer have up-to-date, research-based methods of training, having a trainer teach you guys together how to work with the dog will probably alleviate some of the tension. You telling him, or him telling you, how it’s “supposed” to be probably won’t go well when there’s already tension surrounding the dog’s behavior. Bringing in a third party can put both of you on level, neutral terrain, side by side.
And @Zaku or anyone else, if you’re curious, the concept of an alpha dog and a pack structure based on dominance is, actually, false, and has been rejected by the scientist who first proposed it (David L. Mech). You can probably find a lot online if you search “alpha dog myth” or something similar, or search Mech himself and his research. The concept arose from a study in the 70’s that looked at how wolves interacted with each other—but the wolves were captive in an enclosed, artificial environment, and they were unrelated to each other (strangers to each other). In that environment, the wolves competed against each other for scarce resources and formed a dominance-based hierarchy. However, the scientist who first observed that behavior later observed natural wolf packs in the wild. He discovered that wolves actually organize in familial packs, where the “leaders” are the leaders because they’re the parents to the rest of the pack members.
Dogs bond strongly with their human families, and have evolved over 15,000–30,000 years (depending on where we date the first dog-human contact) to understand human communication cues better than any other nonhuman animal. Although they respond to dominance tactics (out of fear,) there’s no reason to use that as a means to control them, and the chronic stress it induces (which isn’t healthy already) can actually make them more reactive (which can be problematic for everyone).