Need advice

There is a boy I literally fell in love with but my new best friend started crushing on him before me

I really really like him and I feel like I love him but I can’t tell her! I’ve told my other friend and she was like defo do not tell her and I was like oh ok I won’t and she was like definitely don’t tell

she always goes on about him and I’m going to a party with them both there

Idek what to do help me 😪

Whenever I see him I just wanna be like

( me and my friend R 15 btw so I don’t want drama)