As hard as it is for me to read this, the idea of you leaving us makes me wanna vomit a little.
I am so proud of you for even thinking of it like that, a baby step in a huge move.
It shows your growth in the last two years as a person and I think you are a 100% correct we need to be careful to not get too deep and stay there for too long, this world is awful and it can get a little hard to breath sometimes.
Air mask for yourself first.

For the record as I see it, your just a flight away and nothing is permanent in London until you make it. I love you