Deeper level includes sex. Sex is about sharing.
If she is having issues with sex it can be understood from what you describe, but she must also understand what it means to you. If she cannot or does not want to, leave her. If she can hear what you have to say and can, within one or two days, decide to accept the reality of what you said and how you feel, then she will realize that she must do something.
If not, either she does not care about you or she is simply totally stuck with her own problems. Whether you want to spend years trying to fix a broken person, or not, is your personal choice. I have understood that we cannot change people who do not want to change. In such a case I would move on to someone else, because life is precious and, helping people is a full time job. Not mine.
There is one book that could help .it is called \" The erotic mind : unlocking the inner sources of passion and fulfillment\" by Jack Morin. In fact it is a great read for pretty much everyone.