My sister and best friend now hangout and are going to each others parties?
I have been best friends with this girl since 4th grade. We do EVERYTHING together. Recently my sister (who is two years younger than us) has started hanging out with her. At first i didn't care but now it is starting to bug me that they are such good friends. I expressed this to my friend and she got very mad at me. She told me i couldn't tell her who she can and cannot be friends with. I still want them to be "friends" but it bothers me somewhat that they hangout by themselves. Now my friend and I are in a big fight over it and I don't know what to do! HELP!!!