@Whenwillow
I'm so sad for you

It must feel like they don't consider you family. I think some of the previous posters have been quite harsh if I'm honest.
It must feel particularly awful in covid times when we're cut off from our friends as well.
I think you are grieving twice over: once for the poor little girl who was sent to boarding school on your step-father's say so (and your mother who went along with it) and again now for the relationships that have been re-kindled.
I'm sorry. I wish I had more to offer than sympathy. It must hurt like hell. I can only suggest making the most of video calls and the like, if you want to, and maintaining friendships locally. Do you have the sort of friends who understand and will listen?
This. ^
@Shehasadiamondinthesky I am so sorry for you, because it really seems like your 'family' simply don't care about you. I don't think they dislike you; they are just so focussed on themselves that you don't figure in their everyday plans. You are quite low on their list of priorities.
As that poster says ^ it must hurt like hell, but you are not the first to be treated like this by 'family' and you need to try and focus on what you have here, and to hell with them. They are also hilariously deluded if they think life is going to be so wonderful in Australia (compared to the UK.) The grass isn't always greener and so on.......
Personally, I think ANYone moving 10,000 miles away - permanently - doesn't give a shit about about the people they are leaving behind. They can say 'ooh it's for a new life, and it's up to us, it's our life yada yada...' But I don't see how you can move so far away, unless you have no-one here who means anything to you. And as I said, it's hilarious that they think life will be any better. For most people who move to Australia or NZ (from the UK,), it isn't. For many, it is worse.
If someone of close kin to me moved away to Australia or NZ, then it would be game over for me when it comes to making an effort to keep up contact, and like fuck would I ever be visiting them. If they chose to move away so far, then I'd wash my hands of them. Yeah, that's what I said! They clearly didn't give a shit about me when they fucked off to the other side of the world, so that would be it for me.