I wasn't sure where to post this..but I really could use some advice.
I joined my sorority a year ago. I knew I'd make friends but never thought I'd make such good ones. My Big is my best friend

We still can't believe we've only known each other for a year we're that close.
The problem comes in because she also has 2 other Littles besides me. When we hang out and go to sisterhood events it has gotten to the point where my Big and I make a conscious effort not to sit by each other and we are basically keeping the fact that we are best friends a secret (as weird as that sounds)...we're doing this because my Big doesn't want to be "picking favorites" and also because one of her other Littles seems really insecure and jealous that we're so close.
I'm not sure what I should do. I feel like I am sneaking around and I hate the fact that I can't be happy that I have a best friend that is also my Big sis in public. The whole situation is causing a lot of guilt between me and my Big because we don't want to hurt anyone but at the same time we like hanging out and ..you know doing what besties do!
Should we just come out with the truth to her other littles?
Any suggestions on what to do??