Part of the reason a girl sees a man as a friend is that he's always there when she wants him. Reduce the period of time you speak on the phone to her, see her at home, email her and instant message her. When you see her Flirt casually with her.
Compliment her on her eyes, smile, laugh and clothes. Make a point to touch her arm, hand, shoulder, knee or face to hang out and when speaking with her. Changing your character will backfire in the end once you go back to your old self. Pay more attention to your wardrobe and cleanliness.
It's easy to get comfortable around a friend and wear sweats, or hug them when you haven't showered in a couple of days, but you'll impress her more by looking and smelling good.
Disappear for a while and date other girls. You must stop being the go-to guy when she wants to talk or hang out. Plus this shows her that your world doesn't revolve around her and that there are other girls interested in you. Speak to her and tell her how you feel, if none of your subtle efforts work. The worse that can happen is that she'll respond in a way that lets you know she'll never consider you boyfriend material, and you can either continue the friendship or walk away.
Asking your best girlfriend out on a date might seem like a daunting challenge, but dating a close friend can also mean more interests and hobbies in common. How to go about asking your best girlfriend out will vary depending on the type of girl she is and whether she prefers men to be upfront and forward or more reserved when dating. Invite her out on a lunch date during the day for just the two of you. Ask her to see an upcoming movie you both are looking forward to, or even ask her to help you find a new shirt at the mall.
