Rollo Tomassi, very well stated and very true
You're swaying away from the sexy guy side and more towards the platonic friend side through the way you're acting/communicating when you're around her. Lovey dovey comments are always a red flag to me since they should always be sparing.
I've been where you are a few times, beware man, this leads to "Hun, we need to talk about "us"" real soon.
Do you find that she gets b!tchy with you for no reason? Call her up an you get insta b!tch for no reason? You might get that pretty soon. (last ditch test by a girl to find out if you're at least a base level man and will argue with her and put her in her place if she's being a b!tch)
You may not be doing things that she's sexually turned on by anymore (showing your sexy traits). Showing that other women want you is the big one (like Rollo mentioned), showing that you're dominant over her through strength (not being harmful but playfully holding her arms and not letting her squirm out or something similar), or intellect...when women observe you being really smart or smarter than her it can be a turn on, being a tease and playing hard to get (you'll get sex when I give it, not when you want! playful of course), not giving her something that she wants, not being lovey dovey (friend stuf! ugh! Needs to be sparing!) all the time, sexy talk to get her turned on, be unpredictable ( say one thing, do another, make witty comments, do something off the wall, say something off the wall in an off key situation) sexual touching/teasing (not constant, but a little touch in one of her "soft spots" and draw back, exciting experiences that really get the sexual juices flowing, come up behind her and nibble on her neck and whisper something sexy in her ear...
Or how about this one.
TAKING CHARGE.
That’s usually a big turn on because it says the right things about you on an emotional level to a woman.
"If i take charge then she might see me a a sex hungry guy which isn’t good." - This quote by you is probably the #1 reason why you're not getting it as much as you want or have it on call! Because a sex hungry man wouldn't ask that question, he'd be fvckign his GF instead of posting on sosuave. That's not to make you feel bad, but just so you can recognize "Oh, damn, I'm doing something wrong here and I need to fix it, and now I know what"
And be able to recognize when she wants it so you can rock her world on a whim, when she gets that longing look in her eyes, starts getting playful, insinuating innuendos when you are alone, always misinterpret it as wanting to have sex... because she should want most of the time if she's sexually attracted to you.
Anyway, hope this helps, but I am 100% sure that if you don't reinstate your manhood at some level (and not by being a macho man or yelling at her or something 3rd grade like that) you're relationship is going to end soon.
ok and last but not least...
Best friends act a certain way towards each other. They do certain things that make them friends. Help her out = friend action = friend feeling.
Sexually attractive men act a certain way. They do certain things that make them very sexual. Don't take anyone’s sh!t = strength = sexy = sexual feelings from the girl.
You can be a best friend and a sexually attractive man at the same time HOWEVER you need to strike a 70 (sexually attractive man) 30 (best friend) balance at WORST if you want the relationship to last, meaning more sexy man less best friend.
Anyway, hope that helps ya man.