I'm in love with a girl who's straight and I want to know how to seduce her.?

I'm James friend on his account and I'm a girl. I want to know how to seduce my bestfriend who claims she's straight. I'm a lesbian but she dosnt know it. She let's me cuddle her sometimes, and we hug alot and have had wrestling matches as a joke in which I get to touch her alot. She's amazingly cute and I want her. Even just to kiss her and cuddle her all night. But I need to get in bed with her first. Any advice?