If she likes me and I liked her back: flirting and baking food for her (if in college or something of the sort, work, etc) daily, I would also after a time so I got to know her better tell her of my feelings for her and wait for the hammer to crush me or other.
If she liekd me and I didn't feel the same way. I would tell her something liek this; "Your a great friend and I hope to always be by yourside as you have mine, as a friend." If she cries or gets hurt becasue I'm her friend I will comfort her, but sex IS NOT COMFORT.
I love hanging out with girls alone, becasue I feel more liek myself talkign to someone who is interesting and has a different take on life - while in the miliart I would always go off base and find people to talk with, just becasue it was another human, becasue he/she breath the same air, drink the ssame water, and have feelings and love.