(1) Ignore me sexually, not be my lover, be afraid of initiating, not show any passion, etc....
(2) Tell me he's thinking about getting it elsewhere because I'm not putting out.
(3) THEN start trying to seduce me
I'd certainly tell him to get the H E L L away from me. It sounds like the adult version of if-you-loved-me-enough-you-would-and-if-you-don't-i'll-dump-you-so-put-up-with-the-groping-or-whatever-i-want.
Things would be different if she were in fact turning down your non-skittish, authentic, passionate, sincere sexual advances over and over. But this is not the case. You treat her like a sibling and now want to complain that she's treating you like a brother.
No doubt, before you leave your W because you want a lover, you should tell her that first. BUT, before you attack her for not being her lover, you should at least give her a chance to be your lover by treating her like one.