I haven't been around for awhile, but when I was I often wondering how you were doing and where you were in your sitch.
Sounds like it hasn't changed.
So, you want to know how to become attractive to her -- well, my friend, you should know the basics by now, right? New cologne (try Chrome -- chicks dig it ), new duds, new head/facial hair, working out, finding sexy new hobbies like salsa dancing, etc. What have you tried so far? What do you know that she find attractive? THINK MAN, THINK! You've been at this long enough to know. How about some semi-flirty, somewhat elusive, light-hearted banter? You know, touch-and-go type stuff. Don't do it and linger for a response -- just do it in passing, and make seem like no big deal. Like you're just having fun and have no ulterior motive. That kind of stuff exudes confidence, my friend. Be the man -- have no fear! If the response is stale or negative, let it simply be water off a duck's back -- don't let it soak in and consume you, just dust yourself off and repeat (or try something different).
Whatever you do/try, it's not gonna change things (minutely or radically) over night, so just take stock and monitor results.