Hating Myself over Boy

There's a girl. Possible Girl for Possible Boy.
I want to be perfect. I want to be the perfect friend and perfect person who can objectively see how good it is for Possible Boy to have a romantic interest that isn't me or Aural Girl, allowing him to start separating his friendship support system from his amorous subplots. It's something I need to do, too. Logical Annabell knows this.
But Logical Annabell also has support systems stationed in random pockets around the country. And Annabell's imperfect human emotional side craves a hypothetical boy who can look at all my inside goop and understand and hold me, who has the same inside goop and wants to be heard and held back, and then kissed until all the lonely pain stops tasting so bitter because now you're tasting it on love's lips.
With Possible Boy, I ran things backwards. I was trying so hard to look shiny and perfect, I didn't let him near all the important things. Between phone sex and my disastrous long-term friends-with-benefits non-relationship, all things sex default to a setting of fun with quarantined emotions. Hell, even before I myself got near sex, these are the two versions of it that existed in my world:
1) sex for unemotional fun, power and procreation
2) sex as the extension and completion of the perfect kiss

Now the stuff that makes me feel like an asshole re: Possible Boy.
I'm trying really hard lately to do things differently and do things for myself and not treat myself like crap. To that end, it's either fish or cut bait, either see about reentering myself in the more-than-friends pool or put some space between us so I can move on.
But Possible Boy doesn't have another support system. He needs a friend, and while I'm not so fabulous that I'm the only person in the entire world capable of providing adequate and proper friendship, I do understand in a way that seems manageable by a limited percentage of the populace. Everybody has different pieces of things they do and don't see. Maybe I like feeling important, or maybe after growing up with my parents hyper-controlling every aspect of my life, it's just more familiar for me to be entirely codependent. But Possible Boy is good at the codependency thing, too. He might say every mushy thing I've said about him, only about Aural Girl. It's this wonderful chain of low self-esteem. We are human and we treat ourselves like garbage so that no one else can treat us worse.

I may have to ask him not to read this post. Will someone please tell me what to do and then blame me when it goes wrong? That's what I seem to find most familiar and comforting.