Im worried for my friend..

this is a pretty serious/ heavy topic im about to dive into. TW is here now.

I have this friend who is really kind at school and normal, but as soon as school ends she hops online to roleplay as a femboy.. 

I keep telling her this is dandrous but she wont listen, even going as far as to make other accounts so i won tsee her playing certain games.

Recently, i saw she was online on roblox playing this fun prty looking game and i joind her. rookie mistake. I saw her with a girl, confused i looked into chat and say "ABC for a femboy!" that she typed. I was shook and left. Later on i saw her playing a sushi game and thought she was finally playhing a normal game. she was on a date with a girl. (shes not even l3$b1@n).

I tried to talk to her and school and she shut me down and now is ignoring me. What do i do, im worried for her safety and if this is going to get worse..