just ask her this:

"do you think we'd make a nice couple?"
2 things can happen:

1-oh dweezel I love and and you make my panties wet, come let me give you a BJ and we will fuck all night.

or

2-Dweezel i dont think of you like that, you're lik a brother to me, i can be comfy and just chill in my PJ with you.

if she says the second one, just say "oh this is embarassing i didnt mean you and I, I meant "common friends name" and I.