Welcome to OF @Bhra_Wizzy
I can understand how this issue can be difficult for most people. Best thing but the hardest thing is to stop seeing her. I mean you want to advance to a real relationship but she doesn’t so she probably has a different agenda. Once she’s told you to forget a relationship, if I were you, I’d forget her completely. Not even being friends “with benefits” with her.
The closer you stick to her, the more you’ll grow emotionally attached and the easier it’ll be for you to get hurt in the future. To avoid this, cut her out completely and instead spend your time and effort on someone who’ll be willing to give you want you want.
There’s plenty of fish in the sea no matter how hard it feels to let go of the one fish dangling off your hook.