As you are no doubt aware, you aren't the first man on these boards who's wife has informed him, in one way or another, that a large part of her problem in not responding to him sexually is his lack of masuculinity -- both in and out of the bedroom: he needs to "MAN UP", take charge, and (figuratively and sometimes literally) 'take' her. When you have the time, read through the following threads:
I'm not saying that you'll identify with *everything* in both threads: Bear and I are quite different from each other, age-wise and otherwise, and have rather different situations. But there is a common theme there that you can follow, and can perhaps see some similarities to yourself in. Take a read, and let us some feedback (regarding both your wife and yourself).
Best regards,
Bagheera
Me 50, W 45, M for 26 yrs S25, D23, S13, S10 20+ year SSM; recovery began Oct 2007