To ask them to be my bridesmaids even though I wasn’t theirs?

[Timetogoo]

I have a group of friends who I have known since I was 3 years old. As we have grown up we have remained good friends but each person has another set of friends who they are extremely close to and consider their “best friends”. For me, all other friends that I’ve made along the way in life have disappeared. I have drifted away from all of them, except this group of girls. For me, they are my closest friends, but for them, they have their own separate friends who they are much closer to.

we are a group of 4 and two of them are already married, one got married last year and the other a few months ago. We weren’t bridesmaids for either of them. Now that I am engaged, I really want them to be mine.

Is this weird to ask someone to be your bridesmaid if you weren’t theirs? I wonder if they will be confused, because we aren’t particularly CLOSE, but we are good friends.

I think that sounds lovely.
It doesn't need to be reciprocal.
You could say something like "as my oldest friends who I've known since X, I'd be honoured if you'd be my bridesmaids"
Then set out your expectations or lack of!
Good luck, give us an update when you've done it.