I've done all the 5 steps, and after 1 month, me and this girl made a lot of progress.

In one month, we sent 1000+ sms to each other.
She tells me a lot of her secrets, and asks for my advice if she has a problem, and I do the same to her.

She laughs at all of my jokes, even if they're not funny.
We've gone out a couple of times with friends , but I haven't asked her out on a date before.

We have a lot in common, same birthday, like the same things, etc.
But, I don't think she's into me. People say we look good together.

Her friends say that around me, she's extremely shy. She likes to smile a lot when she looks at me, i dunno why.

For some reason, I think she likes me, but she doesn't want to go any further. We have a lot of fun together, but I think she doesn't want to show that she likes me.

Help!! Should I go further or just remain friends?