‘I am allowing you to linger’ means:
I have accepted your existence. You are a part of my life now.
I will try to wrap my head around the idea of you.
I will think of you when you are not there.
I will miss you, often and in general.
I will mean it when I tell you to text me when you get home.
I will make plans including you.
I will think of you when I get to somewhere wonderful and promise to bring you there next time.
I will dream of you because I wouldn’t be able to control it.
And you will be part of my routine. You will be my permanent person.
‘I am choosing you’ means:
I prefer to be alone but I’ll stay by your side.
I will reply to your messages.
I’ll consider you.
I will not space out as much.
I will invite you to places I want to visit.
I will stay up if you want me to.