I have tried to give signs such as touching her arm, shoulder and when hugging her I usually place my hand on her lower back. She doesn't seem to seem disgusted or anything, matter of fact, she usually touches me back on my chest, arms and shoulders.
She seem to enjoy our conversations as she smiles and makes eye contact with me, usually when she laughs she looks at me also.
Anyways I am planning on saying this when asking her out;
"There is something I want to talk to you about. I know this might be random as you might not feel the same, I also know that a lot of guys have asked you out before, and that's because you're beautiful with a really nice personality. And honestly I would like to get to know you more than a friend, so my question is, would you like to go out with me this valentines?"