I'm the same age as my H, ow was a bit older I think; if he wanted to he could've found someone younger, but that isnt' the point of the A most times, as my H put it "she was just there".
It is hard to be assertive and confident after the huge blow we took, but that's what you need to focus on, be sure of yourself, be happy with who you are.
I did have that talk w/my H, he was always into sex, and it's taken months for him to initiate and sometimes I suspect he could take it or leave it, or rather work on his projects. But I'd bring it up making sure you dont' sound offended, as calmy as you can tell him you miss being with him. As far as if he'll lie or not, we choose to believe them when they came back, so go with that, what matters is that you are being honest and it's on him if he hides the truth, he can never throw in your face that you didnt' address this problem.
Be not afraid...I will repay you for the years the locusts have eaten Joel2
30something 2kids survivor of S, MLC, A, D I have peace in my heart, at last.