This is going to sound cut throat but - Ultimately we must end up with partners that fit with our long term goals and plans, or there has to be some compromise. Depending on how much you love her, could you hold off kids until she’s ready?
The last thing you’d want is for her to agree to move forward with kids and then for her to regret it. Having children isn’t something that can be half hearted
Trust me, I get these urges to have children occasionally, and it’s difficult because my partner and I are the same age (both 23), and he wants to wait. But I do love him and recognise I’m still very very young, so I can wait
I do genuinely love her, but she's just turned 24 to my 27. Not much of a gap, but she is young having only left university a couple of years ago. Really don't want to tie her down to my plans and needs while she carries on exploring life. And the idea of having children would just complicate things because I don't think her parents are all that switched on to same-sex marriages and two women bringing up children. And to be honest I don't think she is fully onboard either.
Therefore, I think I will cut my losses with her, and just stay friends. I'm sure she'll be quietly relieved by that, and it means one less thing to hold me back (which sounds harsh, but in a good way)
From this post it sounds like you are part of the way to sorting out your issues, at least you are asking questions and actually doing something about it, perhaps the UK isn't really for you from what I understand. Moving back to SA IMO might be the solution, especially with the SAD condition.
I was tossing and turning about this very issue earlier this morning, hence my early presence on here. Have lived here for about 13/14 years, and loved every moment. But I think as I approach another stepping stone in my life, I need to lay some new foundations as soon as I can. And I think being near my family would certainly help (plus they're getting on in years, so will need looking after at some point).
The more I read in the papers about the utter clusterfuck (pardon my French) the UK is heading into over the next 12-24 months with the pandemic, the economy, the national debt and Brexit, the more I am convinced its time to move on, otherwise my depression and anxiety will get worse, as will my drinking.
The South African economy isn't exactly great either, but its more than just that. I have family and friends over there, the climate is better/warmer, and of course its a huge country, so plenty of places to work and live without getting too enveloped in the relentless rat race of urban life.
The more I think about this the more positive I feel I am making the right decision.
There's a great quote from the film "The Shawshank Redemption", which I printed off, laminated and had framed and hung on my office wall years ago, which says
"
Get Busy Living or Get Busy Dying"
Damn Right to the first one!