Bridesmaid in need of advice

[fullertongreek]

So i'm going to be in a wedding for a sorority sister. I was the only one asked from our GLO (even though I know many other sisters thought they would be asked). I was honestly very touched that she asked me until one of our mutual friends and sister decided to apply for the bridesmaids position and asked my engaged friend if she could be in the wedding. Before my engaged friend could answer this girl started talking about being in the wedding without having heard a yes. I'm very very irritated that she did that because being a bridesmaids doesnt consist of ASKING the bride to be if you can be in her wedding. I was honestly very honored that she only asked me from our GLO but now i'm just so pissed off at this girl and what she did and my engaged friend didnt have the heart to tell this girl no so she's in the wedding too!

Does anyone else agree with me? I want to say something to my engaged friend but I dont know if its my place. Help!