What you’re asking for is non-verbal communication. It’s good at a lot of things, such as communicating feeling, but communicating intent is not one of them.
If you’re a guy and you are asking this question, chances are you’re really bad at hiding your feelings. So she already knows that you like her, in some way, shape or form. The problem here is that she doesn’t know how you like her, or what you want to do with her.
To make this known, you have to verbally communicate them to her. Non-verbal just isn’t suited to the task. It’s like if someone asked you what you wanted at McDonalds and you non-verbally communicated to them, “I want a Big Mac with fries, a 4 piece chicken nuggets, and a small coke.”
Sound absurd? It is. But that’s what guys are asking how to do when they ask this question. You’re just going to have to nut up and have a tough conversation with her. It’s either going to go well or it won’t. But you won’t know until you try, and you can’t have a relationship with her until you try.