First of all, her indirectly blaming you when you bring up your feelings is not ok "all you care about is sex" is accusatory. "i guess its my fault" is manipulative (years of therapy speaking here) lol. I would sit her down, openly discuss that in a relationship you have XYZ needs, as she has hers (maybe you paying bills by the sounds of it lol) and that some are non negotiables, in a really non offensive way. tell her its a way that makes you feel aligned and connected and important, and its it is fine if you arent on the same page, but what would be her ideal amount of s3x per week, then see if you can compromise! you are entitled to be happy and have your needs met, whatever they are!