It's not his, nor UK's decision. He has to apply to join.
Then the terms can be discussed.
You're not very clued up on this, are you.
I'm guessing you were a Brexiteer.
I was suspicious at the time because its always people with a grudge - like you because the EU would not let you in to your partners country so he/ she went and left you here on your own. So I looked them up and sure enough -- remainers.