Honest to god, this is the same exact process that I've gone through over the last 2-3 years.
I even worked at a dog daycare facility for 3 years before getting my dog.
I love her with all of my heart, but sometimes? Sometimes I wish I could just be done with her. Oh, you want to go spend the day with your new girlfriend? Sorry dude, you have to keep a time limit in mind because you have a dog. Want to work late? Who will feed her? Want to go somewhere this weekend? Where will your dog go? I'm going to be having dinner with my girlfriend tomorrow so I'll have to take off work early to go home, feed her, walk her, and play with her a little before going out for the evening. Without my dog
If I went back in time to where I was when I adopted her I would do it all over again, but mostly because she provides me with companionship when I'm having a rough time. And let's be honest, for the most part she is pretty low maintenance. I give her a safe home, good food, and attention. She has on multiple occasions provided me with security, and she is overall a positive impact on my emotional/psychological well being. As for security, I'm 6'4 but at night when 3 dudes approach you looking for trouble, having a black dog snarling and ready to throw down does a lot to discourage them. I was just taking out the trash so I would have been out there with or without her, I had just happened to decide to walk her a bit while I was out.
A kid provides some level of companionship, but they can be way more frustrating, destructive, and difficult to care for.
I also came to the conclusion that the women I'm attracted to are way less likely to want kids. (educated and career driven) My current relationship is with a girl who doubts she'll want kids. I think I would be an amazing father, but I don't need to be a father. After my dog, I'm pretty happy with where I am.