An invitation is flattering because it means someone thought of you.
Being expected is different. It means they did not have to.
There is already a chair. Enough wine was bought. Someone assumed you would arrive at roughly the time you usually do, take your coat off in the same place and ask who else is coming even though you know most of them already.
We spend a lot of adult life waiting to be invited. To the dinner, the weekend, the birthday, the group chat we suspect exists without us. An invitation feels like proof that we matter. But it is still a question. Would you like to come? Are you available? Can you let us know by Thursday?
The better friendships eventually stop asking.
Not because attendance is compulsory. Being expected is not the same as being obliged. It is the quiet knowledge that your presence has been allowed for and your absence would alter the room. If you do not arrive, someone will notice. Not because names are being checked, but because the evening is slightly different without you in it.
This is how friendship becomes part of a life rather than another event in the calendar. You stop negotiating every meeting from the beginning. You no longer need a reason impressive enough to justify seeing one another. It is Friday. People are coming over. Bring whatever you are drinking.
The invitation gets you through the door.
The return is what makes a place for you.