Sister fight. Help needed. ?

Listen your not doing anything bad in your part. I would have done the same thing. My friend has put me in this position my times before but i told him to stop and if she doesn't want to understand that you feel uncomfortable in that position it's her problem because you tried to explain to her and you shouldn't feel bad about anything. It is very immature in her part to do this to you and let her be mad at you one day she'll realize she was wrong and come back to you, and don't worry there's many people out there for you or else everything would be perfectly fine with just one boyfriend/girlfriend but it isn't that's why god made infinites amount of people to date and differentiate to find the right one so relax and live life to the fullest and btw don't think my answer is trash please I think it's kinda funny how I'm giving advice to a 26 year old when i'm only 17 ha-ha but good luck