How good are you at telling your wife what’s going on in your head? Not what’s going on at work or how your team is doing. I’m talking about what you’re thinking and feeling, what you worry about, what you would like to change about yourself, how you feel about your marriage, and so on.
Most of us did this fairly well when we were dating and engage. However, many (most?) men pull back after marriage, limiting and even ending deep self-disclosure.
Aside from her desire/need to know you, a marriage needs intimate disclosure to be healthy and grow. While she is unlikely to identify it to you as the problem, a lack of disclosure on your part could be a significant problem for your wife. It can be a major part of why she holds back or doesn’t trust you. It might also be a part of why she is less sexually attracted to you. Of course, the way we guys work, any pulling back on her part in any of these areas tends to cause us to disclose less of ourselves; and it becomes a vicious cycle.
My suggestion is to unilaterally end the downward spiral by working to disclose more of your inner self to her. Open yourself to her in this way, and in time, you may see her open to you in the ways you desire.