If you enjoy the current arrangement, I would think carefully about whether any there's any other kind of pet that could satisfy you and would fit into your life better. Dogs can be lovely, but they are demanding and they place lots of limitations on your day-to-day life (e.g. how long you can go out for, having to go for long walks even when it's cold and/or you're ill and knackered, etc). I was desperate for one until I looked after my DB's (lovely, well socialised, fairly obedient, and very healthy) lab for 2 weeks - if you're caring for a dog on your own, it becomes very wearing and frustrating extremely quickly!
In your position, I'd get a British blue short-hair kitten because, IME, they have almost all of the advantages of owning a dog, but with most of the disadvantages taken out.
I have a lot of experience with animals, and I have never met a British blue that wasn't friendly, inquisitive, playful, tactile, very bonded to its carers, but sufficiently lazy to be easy company. They can make good house cats as long as you are careful not to over-feed them. The only downside AFAIK is that if you allow them to roam freely then they're quite vulnerable to being stolen as they're such a distinctive pedigree.