Firstly, to successfully cut all ties with someone, (which can be incredibly freeing and positive) you have to cut your emotional ties. That doesn't mean repressing or covering your emotional ties it means break them. A great way to do this is through the help of a life coach, (if you need help finding one, PM and I'll search my agency for suitable coach for your needs).
If you don't want to use a coach there are other methods that you can check out. Just Google 'cutting emotional ties+NLP'.
As far as this current situation is concerned, my gut tells me that she'd only come back if she's interested in you in some way. I wouldn't risk the years of heartache and longing you once had and not tell her.
So tell her what interests you about her and how "you want to get to know her at a more intimate level."
This is a guess, but I think it's how you feel. Try expressing this to her: You're not going to get to know her from afar, you want her completely and as she is, which means getting to know every part of her emotionally and physically. If she's willing to accept you as you are, then you can start the exciting and adventurous journey of discovering eachother through something more than a friendship.
Hope this helps buddy.
LoveJunkie