Okay, first, STOP groping. There is nothing that is a more sure-fire guaranteed way to turn off a woman than a man groping at her. Groping will never put a woman in the mood for sex. So, get a grip and quit it. If you are coming off as needy and begging for it, she may feel like you are smothering her. You need to tone it down.
The thermostat - the ultimate barometer of your R
Second, if I were you I would take a little spin into the Men's Clubhouse sub-forum and start reading up on some of the threads on how to man-up - how to become a confident, assured man that a woman would find attractive.
The Man Up and Nice Guy Reference
Whatever it is that you are doing, it isn't doing it for your wife. Think about how you acted with your wife when you were dating and first married. Was she more sexual with you then? So, are you still doing those things? Do you keep your physical person up - do you exercise, keep neat, clean, well-groomed? Do you put any effort into pursuing her and letting her know she is sexy (groping does NOT count), or trying to figure out what she really needs?
A good book to read is "His Needs, Her Needs".
Amazon.com: His Needs, Her Needs: Building an Affair-Proof Marriage Fifteenth Anniversary Edition (9780800717889): Willard F. Harley Jr.: Books 