How should i move forward and maybe push it so we are able to truely express how we feel about each other?

about a year ago i kept going out with this girl. after the third time. one of her friends who i did not know called me and told me she likes me a lot. i accidentally told her about her friend calling me and she got embarressed and did not talk to me for a while. then she said she just wants to be friends. recently i asked her if she wants to hangout sometime. so we did just the two of us went to the movies. I paid for both of us. we both seemed to have fun. i dont know how she is when she is not around me. but when she is around she playes with her long hair a lot and sometimes bites on her nails orr more like sucks her fingers. she is also seems shy around me and sometimes seems like she is too nervous to give me eye contact. do you think she likes me or what? also she seems to smile a lot that is who she is but when i casually see her walk by me when i wave at her she smiles really hard after. i cant tell if it s a blush but definately near it. any ways how do i know when she is comfortable with me being more touchy then just a friend. or make further moves. i am just afraid because when she got embarresed by her friend the only way she started talking to me again was that she said she only wanted to be friends. so obviously i have to now follow her pace. but how do i know when to be more touch and eventually break that just friend barrier. or will it just happen?