Ive known this girl for over 12 years, she's been with me through all kinds of nonsense, just a down ass chick. Knows all about my past kills, my vices and all that and has stuck with me through it all.

Just for the record, this isnt a 12 year old pent up crush thats been bubbling to the surface, fact is, I never saw her that way till now. And, im not naive enough to think that she feels that way about me. We've definitely "friend zoned" each other.

My question is, how do you build up an attraction for a girl in this case? I havent told her how I feel - feels like a bad play.I realise that there isnt going to be an overnight fix so Im open to suggestions.

_________________
Always a student.
Always learning.

My current relationship of 1 year is with a friend I had known for maybe 5 years. Similar scenario, never ever thought of her more than just being a friend..

You are right, it has to be a very slow process. Especially if you are not sure she feels the same.. I'd just try light kino on her and gradually build it up over the next weeks (not days). To get her to think about you more, make every time you meet special for her. Knowing her for 12 years means you are aware of what makes her happy, hobbies and all that.
Keep it very light, don't tell her about your feelings. Not even if she calls you out on your behavior. Being light-hearted and playful is the key.
You have to be in a great mood for your quest, so if you're not feeling it 1 day just give her the gift of missing you for a couple of days and recharge yourself - quality over quantity.

But before you even go there, think twice. Are you prepared to risk such a great friendship? Being in a similar situation, I am still not sure if it was the right thing to do. She is the sweetest girl I can think of, 100% relationship material. But I am usually not into long term relationships and I am worried we won't be friends anymore if it doesn't work out...