You answered your own question the title, tell her.

Don't tell her if she doesn't like you.
If she doesn't like you back she'll think you're only talking to her so you can get with her. You don't want that.
Hang out more, make a move but don't go too far. If she lets you make the move, then tell her but yeah.

this

Are you neurotypical?

Pee on her and you will mark your territory

7.8/10 IGN, too much pee

This is what I'm saying; really, it's kind of true. I mean, I think a lot of friendships get formed with people we have crushes on but then we become friends anyway. The idea is to treat people, even those we are attracted to, as friends regardless of our attraction or reason for meeting. In the end, if your attraction is reciprocated it will sort of develop on its own I think.

I seriously get super weirded out by people who are forthcoming if we barely know each other. It is one thing to be attracted to me, but to "like me"? Whatever that means. You don't even know me.

If we do know each other quite well (which takes a lot of time), then I feel disturbed by the whole high school antics of "omg omg omg I have a cruusssh!!!!" Like, I'm not somebody's property.

I also get weirded out by people who sneak around and secretly violate my boundaries without ever been given permission to do so, then when confronted deny it or act like I'm crazy. They tend to keep pushing, as well.

Be respectful; get to know her; if something develops, good. This culture of slutty sexual conquest is a complete lie; the idea of being the pushiest most aggressive "confident guy", used up, getting with this person, that person, high fives from the "bros". These kinds of people may vibrate with the porn industry, but in the end unless they fix it—typically wind up some version of a douchebag incapable of deeper human reasoning. Take the pressure off yourself; it isn't real. There's no rush or race to find happiness; you'll know when the time comes—but it won't be some cheap Hollywood thrill where it's "love at first sight so let's bang".

This pretty much sums up everything you need to know

Lmao if you want to be a social **** and be stuck in the friend zone for life so that.

JUST DO IT!

Don't let your dreams be dreams. Yesterday, you said tomorrow, so JUST DO IT! Make your dreams come true!

When girls say, "I was interested … In the beginning. But now I'm not because we're friends and I want to keep it that way"—it means she isn't interested. If, after getting to know you, someone wants to "keep you friends", then it's a good thing you didn't get together. The "friend zone" is specifically friends & there is nothing you can do to change this nor should you try because women are people not objects, nor did you do something wrong; the only girl who would ever be like, "Oh! He won't make a move on me?? Fine! We're just friends—for life!!!!" is a hussie.

Hey are you that girl from redtube/brazzers

Get a bunch of pictures of her and make a shrine of her in your room. once you feel you have a sufficient amount of pictures, invite her over to your house to see the shrine. I'm sure that will really make her happy.

That's what creeps do but anyway I have no knowledge in how telling someone you like them or dating

nah it works