What do you think

So I have a bestie let's call her W
we have been friend since primary school ,two years ago she introduce another girl to me Z.
We became close friend quickly since we were the only two girl in our class and W was in another class.
But ever since I became close with Z , W became even more "crazy" (once I tried to distance myself from her she was too possessive and I couldn't have any friend then she started a rumors about me and all).
Anyway she forbade me to have anymore contact with Z and all ,I had no peace.
But this situation has partly been resolved.
Recently Z got a boyfriend he live in another country.
He came for a short vacation and they wanted to meet but Z parents would never let her got out for that, so we made plan the three of us to accompany her to fool her parents.
Anyway the day J ,W cancel the plan and we decided that it would be better if I just called Z's dad who will drop her to the meeting place to fool him.
But there, her dad insisted that she won't leave his car unless he see one of us.
I asked W if she really couldn't urgently come to help, she still refused, so I dropped everything to go where Z was having her date I talked with her dad and everything ,when he left, I left my friend and her lover , I went home
Then W send me a msg to say that Z is using me. She talked shit about Z and me.
I'm mad cause I'm just helping my friend and W act like I'm a servant to Z or something.
Who is wrong please , is she right or me ?
Tbh I'm kind of tired but looking at how long we have been friend to the point where our two family became one , I don't think I can try to distance myself anymore, we're basically sister