Dear Cindy7872 AJ,
Friends come and go, but true old best friends are very special and should be cherished. Since your new friend is not comfortable being around your old best friend, this is an obvious problem.
There are a lot of things going on and you don't have much control over it really. Maybe you can just focus on getting back together with your old best friend. It may be difficult, but it might require keeping some distance from your new friend so your old best friend feels you are on their side. You can still keep in touch with them, but focus more on your old best friend. Over time I think the other friends will start to get along better and you can be friends with both people.
I think the new friend of your best friend will feel better dealing with you once your best friend is okay being friends again with you.
