You may be his wife, but you arent his call girl. I think God would understand.
If you feel like sharing yourself with him - by all means, do it.
But if it doesnt seem right to you, dont try to talk yourself into it, I imagine you may only regret doing so in the end?
Have you explained to him that the lack of sex in the relationship was a symptom and not the disease itself? And that you would LOVE to have a mutually satisfactory sex life with him?
Does he have any idea or take ownership of how HIS actions made this problem? Or does he think its 'your' problem?
Me: 37 Wife: 40 Son: 7yo Son: 18 mo Bomb: 12/31/07 Status: Reconciled 1/2009 but backsliding terribly right now