<human>: Give me the gist of the text in a nutshell

I've been in a relationship for seven years. It mostly works great; we LOVE each other, we spend quality time. Don't fight or argue. Hang out with each other's families, are the envy of all couples, blah blah. But for me the sex has been extremely unfulfilling and the feeling is starting to fester. 

Problem is she controls the pussy and thus the availability of sex absolutely. We only have sex whenever she's psyched and ready. And in the years of my domestication I've learnt it's pretty much pointless to try and be the one to initiate sex. At best I can read the hint when she wants to have sex and take over the process of initiating (which isn't really having the fucking initiative, is it?!) 

Secondly she'll generously do wonderful things to get me off, but is not receptive to my own efforts to give her pleasure. A bit of touching and fondling is fine, but I'm not really allowed to try to return the favor. It's decidedly one-sided and not really a good feeling in this kind of relationship.
<bot>: How do I tell my partner of seven years I might want to break up because of poor sexual compatibility? What do you think of the situation?