I don’t agree that all women want less sex than men in a relationship. It just happens that you two have different needs when it comes to this. The only solution is to talk to her about it… and how it makes you feel and come to a conclusion together and agree on a solution. This is something you should talk to her. It may be that she is not very attracted to you or maybe she has her views on sex or maybe she just doesn’t feel the need to do it as often as you want, you’re just different here. The best way to find a solution about something regarding your relationship is to talk to her about it !