You have a girl friend and you both know each other from a while, but until now you are just good friends sharing opinions, joking around and having a good time together by meeting up once and a while and going on night time to clubs and discos and just enjoying a happy friendship together.
Inside yourself you slowly feel that a passion of love is flooding you and you are seriously considering to get away from this "just friends" to something more passionate and intimate where surely sex is involved.
You have the desire of a real transition with this friend to an actual and strong relationship with her.
In one way or another you are trying to figure out how you could possibly escape this simple friendship into something more interesting and passionate, but at the moment you are stuck in this current friend zone, and have no idea how to make the best transition possible for you and your friend, obviously hoping that she is also willing to convert you from a friend into a boyfriend or lover.
The point here is that you are thinking of your friend in a way that you are feeling an immense sexual attraction, but obviously you are asking yourself if she feels exactly the same things as you do.
By trying to change things into your favour, you consider the fact that you could easily risk losing her forever, with this change in attitude, if she doesn't consider you anything other than her friend.
So you want to be careful and figure out how to do this without ruining your friendship in the process.
First of all you might need to evaluate this friendship better, and simply attempt to demonstrate to her that you are willing to show less interest in her and being absent more than normal.
Showing her this, and if she is really interested with you in a more intimate relationship, she will indeed suffer your absence, and will be more willing to have you back.
She will then probably consider you more valuable, and if she acts this way, it's definitely a positive sign that she is feeling some love and desire for you.
In the meantime you are dating this friend, learn to not be too obsessed with her, and so just pretend to be interested in other women by dating others, even just for friendship and maybe this way you will make your somewhat jealous.
In order in to have success with your idea, you will certainly need to change your friend attitudes, like when you are sitting together, give her longer than normal eye contact, or start playing with her hair and caressing them.
If suddenly you are out together and looking at shopping mall windows, and while you see something interesting, all of the sudden you take her hand and pull her slightly to your direction to show her what you have seen.
These small circumstances quite surely signal a boyfriend trait.
Do not forget that you will have to stop being too nice, even if not all at once, since it is obviously a good quality during a friendship, but unfortunately if you are dealing with passion and sexual attraction, being too nice won't make you achieve the traits of a seducer, but rather those of a close and intimate friend.
You only need to fool around with her and start being a little naughty by flirting and daring to be a seducer that wants passion to fly high, and so make her understand this.
Turning a friend into a girlfriend is almost every man's desire, since you know your friend quite well, and you both have experienced many pleasant moments together, and so in order to surely succeed with your plan you will surely need to adapt these attitudes that I have described.