As long as you don't tell her you love her it should be good from my perspective. SMoke some bongs with her, or a joint, watch a movie she likes, play it cool for the first 10 mins, see what she's doing, if she's being timid, just put your arm around her side, play it natural, just enjoy it. If she's like what are you doing? Tell her how you feel. I wouldn't ask her out though, i'd just tell her you like her. Take it from there, if she says no, she'll prob be an even better friend then she was before. The situation will only become awkward if you allow it to be.