Aibu?

[GinDrinker00]

Moved up to be nearer DHs family years ago. Didn’t really want to leave my family as we’re all quite close but DHs Mental health was bad were we lived and his family thought it’d help him living nearer them and in a new area and to that degree they were right DH got better.
Years later and I seriously regret it. None of his family make an effort, it was DCs birthday a few weeks ago didn’t expect anything off anyone but would of been nice for them to say happy birthday to my child!
Both SILs forgot, one messaged the next day and the other didn’t bother at all. PILs didn’t make an effort either (didn’t make an effort on other DCs birthday last year too) yet when it’s the other children’s birthdays they always make a big fuss. It’s not just that it’s tons of little things building up to a bigger picture of they simply don’t give a shit. I’m absolutely miserable, I haven’t seen my own family for 6 months and will probably be another 6-9 before we can see them again!
AIBU to want to move back after lockdown is finished and tell ILs they had their chance and well and truly fucking blew it even though DH might struggle with his MH if we moved back?

It’s weird that they were so concerned and supportive about your DHs mental health to the point you moved there to live near them and yet they make such little effort with his child. What does your DH think about their attitude?

DH doesn’t seem that bothered by it to be honest! He has had words in the past but now doesn’t want the arugements. Whenever I bring it up he says the same thing every time “but it’s better for us to live here” even though he knows how badly it’s effecting me. I’ve always put DHs And his families happiness before my own and forgiven him/them for a lot of things in the past and I’m starting to get annoyed with it.

Looks like it’s time to put your mental health first......

Whenever I bring it up he says the same thing every time “but it’s better for us to live here” even though he knows how badly it’s effecting me.

Sorry, OP, but the answer to that is "it's clearly not better for me so we're going back"

The question is, will he actually move back as it seems as though he's decided that his mh being better is his view of best for the family as a whole.

Some difficult conversations are needed....

Well now it’s detrimental to your mental well-being so he can return the favour!
Can you move back in the general direction but not the exact same area ? May be a bit of give and take ?

Why is it better to live where you are? What’s better about it?